You can get a copy of SolidWorks - just go to
www.solidworks.com/SponsoredDesignContest and fill out the form on the right side. We do not do a download for robot teams - we ship a DVD.
If you want to perform stress analysis or motion analysis on your robot please say so. We will have a 64bit student version this summer.
There are many FIRST teams that use SolidWorks - more importantly there are many companies that use SolidWorks. SolidWorks skills are good to have in your background as an design engineer. Marie