Modling helpp.

I can model with solid works 2010 but I don’t know how to convert it (.sldprt files) to something Garrys Mod actually understands. I know hammer will save them as usable, but it wont open .sldprt models. Is there a converter or something out there?

You can export it as a obj and convert it to a smd with obj2smd.exe. Then compile it using this documentation:
http://www.facepunch.com/showthread.php?t=939746

It’s not the best option however, you might need to switch to a more compadible program like blender(free), 3dsmax or milkshape.