When ever I use tool I get errors when creating the collison model. Im past the bitmaps and model conversion but when i get to creating the collison model it comes up with different errors.

Post the last entry of your debug text located in your halo custom edition folder

the reason u r getting collision building trouble is because the models u r using are not sealed or somehow dont fit the rules of halo.
i never worked on scenery much, can u import a nameofmodel.wrl into 3ds max?
if ss then that will show u what problems there are.

Im not using 3ds im using gmax. And the models im trying to make arent mostly scenery but Weapons

ok what errors are u getting exactly?
failed to build collision?
weapons dont need to be sealed but the collision does i think u need to replace the weapon with a box that just covers the weapon and keep markers and nodes and also texture the box (weapon), link it same as before then export as collision.
the collision of models needs to follow halo rules.

OK i got the collison model made. BUT are the markers supposed to shrunk down or left a large blob bigger than the gun?