3D content central help

When downloading parts from content central is it possible toedit the part. I am trying to design some racks from extrusions andthe feature seems to be locked. I can edit part length in contentcentral and then download it, but this seems way too timeconsuming. Here is the part I am trying to work withhttp://www.3dcontentcentral.co...load-part.aspx?id=2726SolidworksGeneral