Hello again everyone and thanks for the help with my latest venture  luckily that was solved, now onto some stuff I just can't find.
How in the hell does the semtex stick to the zombies? I have the waw sticky and it doesn't seem to work the same (unless i'm just hallucinating the semtex sticking to them  )
anyways, thanks for putting up with my crap.

Semtex (or sticky grenades in general) will not join to an ai on impact, only bsp and models with collision.
The way most people - including myself - have done semtex is through script, where u basically waittill the player throws a grenade and delete it replacing it with your own scriptmodel. Then wait until it has stopped moving and check if the distance to a zombie is close enough, if it is then join the model to the zombie and create ur grenade explosion stuff in script.