Cutting Vex Parts in Solidworks

OK guys i am using Solidworks 2010 and I understand that you can download pretty much every part from this website but sometimes you need to cut metal. I cannot figure out how to do that. I downloaded say a 1x2x1x25 C Channel and I want to cut it to 1x2x1x24. Could someone please show me how. I am starting to get frustrated and i want to be able to finish up one of our designs for Gateway.

P.S. A Teaser might be coming in the near future :slight_smile: