Save/export the file as an stl from Solidworks. Download and try the STLWorks from Imserve, they advertize on the site here. Use it to generate your G-Code. You can get it as an eval for free and see if that does the trick for you. There are other CAM programs out there - but I've found STLWork fairly easy to use - mind you ya gotta spend a few moments on the help files!
Cheers - Jim
Experience is the BEST Teacher. Is that why it usually arrives in a shower of sparks, flash of light, loud bang, a cloud of smoke, AND -- a BILL to pay? You usually get it -- just after you need it.