Alright, i'm using this workspace setup : http://www.wuppy29.com/minecraft/modding-tutorials/wuppys-minecraft-forge-modding-tutorials-for-1-7-set-up-part-2b-advanced-forge-setup/
So, I am unable to get the assets to work (including lang files [tile.block.name !] and textures [magenta-black squares !]).
Currently I have this folder structure in my mod project :
[MyModName]
-src (buildpath)
--packages and codes
-assets
--[mymodid(yes, in all small case)]
---lang
----en_US.lang
---textures
----blocks
-----my textures
-mcmod.info [This isn't working, too. Maybe different location ?]
Any help is appreciated.