[FoShizzle]

Are you sure you made the pk3 correctly? Go to Pakscape, click new. In the empty area, right click, scroll to object, and choose new directory, name it textures. In the textures directory, make a new one in the same way, and name it models. In the models directory, make a weapons directory, then from there make a directory called p_masher (for the axis grenade), and M2Grenade (for the allied grenade.) Now stick the axis grenade you made in p_masher, and your allied one in the m2grenade. Save it as "User - My grenades" or something similar, and try it out. That is usually the problem I have, I don't pack it correctly the first time.