As the title says, the .iwd's I have in IW4M/m2demo don't work anymore. I have custom camos and stuff, and they used to work when I last played a few weeks ago. Anyone know what's wrong?

/main/ perhaps?

when i do that, i get that stupid "no ammo" glitch

You'd get the no ammo glitch if you edit some of the weapon files.

well how about that. when i put something in the main folder 2 days ago, nothing happened and i got the no ammo glitch. now it works flawlessly, what the heck.

It actually depends on what files are inside by the way as well as how the archive is saved.