Using an *.igs or *.stp file on SW 2011

Hi

Does anybody know how make an *.igs or *.stp file usable on SW 2011?

I need to modify or take measures from a *.igs or *.stp file but I don't know how to do it. We typically got this file format from supplier or designers.

I think I should convert it into a SW 2011 format. Please help me.

Thanks!

SolidworksImport export