hey,
the "##somename.mdl" files are player models, they should be randomly assigned to each team, so that everyone on one team has the same skin. In PTB's code, you'll see that when you create a team, the color of it is mentioned, it should match the name after the number I've given it ("desert" fx.).

the v_, p_ and w_ models are weapons, the w_model isn't used, but it was so incredibly easy to make that I though I might as well create it.

the shell modem replaces the normal 9mm shell model, and the 556shell model is used for for the xm177e2 gun.