diff --git a/source/cfgu.c b/source/cfgu.c
new file mode 100644
index 0000000..57829d0
--- /dev/null
+++ b/source/cfgu.c
@@ -0,0 +1,311 @@
+/***
+The `cfgu` module.
+Used to get some user config.
+@module ctr.cfgu
+@usage local cfgu = require("ctr.cfgu")
+*/
+
+#include <stdlib.h>
+
+#include <3ds/types.h>
+#include <3ds/services/cfgu.h>
+#include <3ds/util/utf.h>
+
+#include <lua.h>
+#include <lauxlib.h>
+
+/***
+Initialize the CFGU module.
+@function init
+*/
+static int cfgu_init(lua_State *L) {
+	initCfgu();
+	
+	return 0;
+}
+
+/***
+Disable the CFGU module.
+@function shutdown
+*/
+static int cfgu_shutdown(lua_State *L) {
+	exitCfgu();
+	
+	return 0;
+}
+
+/***
+Return the console region.
+@function getRegion
+@treturn number region
+*/
+static int cfgu_getRegion(lua_State *L) {
+	u8 region = 0;
+	
+	CFGU_SecureInfoGetRegion(&region);
+	
+	lua_pushinteger(L, region);
+	return 1;
+}
+
+/***
+Return the system model.
+@function getModel
+@treturn number model
+*/
+static int cfgu_getModel(lua_State *L) {
+	u8 model = 0;
+	
+	CFGU_GetSystemModel(&model);
+	
+	lua_pushinteger(L, model);
+	return 1;
+}
+
+/***
+Return the system language.
+@function getLanguage
+@treturn number language
+*/
+static int cfgu_getLanguage(lua_State *L) {
+	u8 language = 0;
+	
+	CFGU_GetSystemLanguage(&language);
+	
+	lua_pushinteger(L, language);
+	return 1;
+}
+
+/***
+Generate an unique hash from the console ID.
+@function genHash
+@tparam number salt 20-bits salt
+@treturn number 64-bits hash  
+*/
+static int cfgu_genHash(lua_State *L) {
+	u32 salt = luaL_optinteger(L, 1, 0);
+	u64 hash = 0;
+	
+	CFGU_GenHashConsoleUnique(salt, &hash);
+	
+	lua_pushinteger(L, hash);
+	
+	return 1;
+}
+
+/***
+Return the username.
+@function getUsername
+@treturn string username
+*/
+static int cfgu_getUsername(lua_State *L) {
+	const u16 *block = malloc(0x1C);
+	
+	CFGU_GetConfigInfoBlk2(0x1C, 0xA0000, (u8*)block);
+	u8 *name = malloc(0x14);
+	utf16_to_utf8(name, block, 0x14);
+	
+	lua_pushlstring(L, (const char *)name, 0x14); // The username is only 0x14 characters long.
+	return 1;
+}
+
+/***
+Return the user birthday.
+@function getBirthday
+@treturn number month
+@treturn number day
+*/
+static int cfgu_getBirthday(lua_State *L) {
+	u16 tmp = 0;
+	
+	CFGU_GetConfigInfoBlk2(0x2, 0xA0001, (u8*)&tmp);
+	
+	u8 month = tmp/256;
+	u8 day = tmp%256;
+	
+	lua_pushinteger(L, month);
+	lua_pushinteger(L, day);
+	return 2;
+}
+
+// Functions
+
+static const struct luaL_Reg cfgu_lib[] = {
+	{"init",          cfgu_init       },
+	{"shutdown",      cfgu_shutdown   },
+	{"getRegion",     cfgu_getRegion  },
+	{"getModel",      cfgu_getModel   },
+	{"getLanguage",   cfgu_getLanguage},
+	{"genHash",       cfgu_genHash    },
+	{"getUsername",   cfgu_getUsername},
+	{"getBirthday",   cfgu_getBirthday},
+	{NULL, NULL}
+};
+
+// Constants
+
+struct { char *name; int value; } cfgu_constants[] = {
+	/***
+	Constant returned by `getRegion` if the console is from Japan.
+	It is equal to `0`.
+	@field REGION_JPN
+	*/
+	{"REGION_JPN", CFG_REGION_JPN},
+	/***
+	Constant returned by `getRegion` if the console is from USA.
+	It is equal to `1`.
+	@field REGION_USA
+	*/
+	{"REGION_USA", CFG_REGION_USA},
+	/***
+	Constant returned by `getRegion` if the console is from Europe.
+	It is equal to `2`.
+	@field REGION_EUR
+	*/
+	{"REGION_EUR", CFG_REGION_EUR},
+	/***
+	Constant returned by `getRegion` if the console is from Australia.
+	It is equal to `3`.
+	@field REGION_AUS
+	*/
+	{"REGION_AUS", CFG_REGION_AUS},
+	/***
+	Constant returned by `getRegion` if the console is from China.
+	It is equal to `4`.
+	@field REGION_CHN
+	*/
+	{"REGION_CHN", CFG_REGION_CHN},
+	/***
+	Constant returned by `getRegion` if the console is from Korea.
+	It is equal to `5`.
+	@field REGION_KOR
+	*/
+	{"REGION_KOR", CFG_REGION_KOR},
+	/***
+	Constant returned by `getRegion` if the console is from Taiwan.
+	It is equal to `6`.
+	@field REGION_TWN
+	*/
+	{"REGION_TWN", CFG_REGION_TWN},
+	
+	/***
+	Constant returned by `getLanguage` if the language is Japanese.
+	It is equal to `0`.
+	@field LANGUAGE_JP
+	*/
+	{"LANGUAGE_JP", CFG_LANGUAGE_JP},
+	/***
+	Constant returned by `getLanguage` if the language is English.
+	It is equal to `1`.
+	@field LANGUAGE_EN
+	*/
+	{"LANGUAGE_EN", CFG_LANGUAGE_EN},
+	/***
+	Constant returned by `getLanguage` if the language is French.
+	It is equal to `2`.
+	@field LANGUAGE_FR
+	*/
+	{"LANGUAGE_FR", CFG_LANGUAGE_FR},
+	/***
+	Constant returned by `getLanguage` if the language is German.
+	It is equal to `3`.
+	@field LANGUAGE_DE
+	*/
+	{"LANGUAGE_DE", CFG_LANGUAGE_DE},
+	/***
+	Constant returned by `getLanguage` if the language is Italian.
+	It is equal to `4`.
+	@field LANGUAGE_JP
+	*/
+	{"LANGUAGE_IT", CFG_LANGUAGE_IT},
+	/***
+	Constant returned by `getLanguage` if the language is Spanish.
+	It is equal to `5`.
+	@field LANGUAGE_ES
+	*/
+	{"LANGUAGE_ES", CFG_LANGUAGE_ES},
+	/***
+	Constant returned by `getLanguage` if the language is Chinese.
+	It is equal to `6`.
+	@field LANGUAGE_ZH
+	*/
+	{"LANGUAGE_ZH", CFG_LANGUAGE_ZH},
+	/***
+	Constant returned by `getLanguage` if the language is Korean.
+	It is equal to `7`.
+	@field LANGUAGE_KO
+	*/
+	{"LANGUAGE_KO", CFG_LANGUAGE_KO},
+	/***
+	Constant returned by `getLanguage` if the language is Dutch.
+	It is equal to `8`.
+	@field LANGUAGE_NL
+	*/
+	{"LANGUAGE_NL", CFG_LANGUAGE_NL},
+	/***
+	Constant returned by `getLanguage` if the language is Portuguese.
+	It is equal to `9`.
+	@field LANGUAGE_PT
+	*/
+	{"LANGUAGE_PT", CFG_LANGUAGE_PT},
+	/***
+	Constant returned by `getLanguage` if the language is Russian.
+	It is equal to `10`.
+	@field LANGUAGE_RU
+	*/
+	{"LANGUAGE_RU", CFG_LANGUAGE_RU},
+	/***
+	Constant returned by `getLanguage` if the language is Taiwanese.
+	It is equal to `11`.
+	@field LANGUAGE_TW
+	*/
+	{"LANGUAGE_TW", CFG_LANGUAGE_TW},
+	
+	/***
+	Constant returned by `getModel` if the console is a 3DS.
+	It is equal to `0`.
+	@field MODEL_3DS
+	*/
+	{"MODEL_3DS",    0},
+	/***
+	Constant returned by `getModel` if the console is a 3DS XL.
+	It is equal to `1`.
+	@field MODEL_3DSXL
+	*/
+	{"MODEL_3DSXL",  1},
+	/***
+	Constant returned by `getModel` if the console is a New 3DS.
+	It is equal to `2`.
+	@field MODEL_3DSXL
+	*/
+	{"MODEL_N3DS",   2},
+	/***
+	Constant returned by `getModel` if the console is a 2DS.
+	It is equal to `3`.
+	@field MODEL_2DS
+	*/
+	{"MODEL_2DS",    3},
+	/***
+	Constant returned by `getModel` if the console is a New 3DS XL.
+	It is equal to `4`.
+	@field MODEL_N3DSXL
+	*/
+	{"MOdEL_N3DSXL", 4},
+	
+	{NULL, 0}
+};
+
+int luaopen_cfgu_lib(lua_State *L) {
+	luaL_newlib(L, cfgu_lib);
+	
+	for (int i = 0; cfgu_constants[i].name; i++) {
+		lua_pushinteger(L, cfgu_constants[i].value);
+		lua_setfield(L, -2, cfgu_constants[i].name);
+	}
+
+	return 1;
+}
+
+void load_cfgu_lib(lua_State *L) {
+	luaL_requiref(L, "ctr.cfgu", luaopen_cfgu_lib, false);
+}
diff --git a/source/ctr.c b/source/ctr.c
index 37e2c19..2359bcb 100644
--- a/source/ctr.c
+++ b/source/ctr.c
@@ -70,6 +70,13 @@ The `ctr.qtm` module.
 */
 void load_qtm_lib(lua_State *L);
 
+/***
+The `ctr.cfgu` module.
+@table cfgu
+@see ctr.cfgu
+*/
+void load_cfgu_lib(lua_State *L);
+
 //void load_cam_lib(lua_State *L);
 
 /***
@@ -111,6 +118,7 @@ struct { char *name; void (*load)(lua_State *L); void (*unload)(lua_State *L); }
 	{ "fs",    load_fs_lib,    unload_fs_lib    },
 	{ "httpc", load_httpc_lib, unload_httpc_lib },
 	{ "qtm",   load_qtm_lib,   NULL             },
+	{ "cfgu",  load_cfgu_lib,  NULL             },
 //	{ "cam",   load_cam_lib,   NULL             },
 	{ NULL, NULL }
 };
diff --git a/source/httpc.c b/source/httpc.c
index 756c069..e104e18 100644
--- a/source/httpc.c
+++ b/source/httpc.c
@@ -58,6 +58,27 @@ static int httpc_open(lua_State *L) {
 	return 1;
 }
 
+/***
+Add a field in the request header.
+@function :addRequestHeaderField
+@tparam string name Name of the field
+@tparam string value Value of the field
+*/
+static int httpc_addRequestHeaderField(lua_State *L) {
+	httpcContext *context = lua_touserdata(L, 1);
+	char *name = (char*)luaL_checkstring(L, 2);
+	char *value = (char*)luaL_checkstring(L, 3);
+	
+	Result ret = httpcAddRequestHeaderField(context, name ,value);
+	if (ret != 0) {
+		lua_pushnil(L);
+		lua_pushinteger(L, ret);
+		return 2;
+	}
+	lua_pushboolean(L, true);
+	return 1;
+}
+
 /***
 Begin a request to get the content at the URL.
 @function :beginRequest
@@ -156,12 +177,13 @@ static int httpc_close(lua_State *L) {
 
 // object
 static const struct luaL_Reg httpc_methods[] = {
-	{"open",            httpc_open},
-	{"beginRequest",    httpc_beginRequest},
-	{"getStatusCode",   httpc_getStatusCode},
-	{"getDownloadSize", httpc_getDownloadSize},
-	{"downloadData",    httpc_downloadData},
-	{"close",           httpc_close},
+	{"open",                  httpc_open                 },
+	{"addRequestHeaderField", httpc_addRequestHeaderField},
+	{"beginRequest",          httpc_beginRequest         },
+	{"getStatusCode",         httpc_getStatusCode        },
+	{"getDownloadSize",       httpc_getDownloadSize      },
+	{"downloadData",          httpc_downloadData         },
+	{"close",                 httpc_close                },
 	{NULL, NULL}
 };