A friend recently bought a vinyl cutter and is using WinPCSign on a trial version on his Windows XP laptop. I brought him a file to test, an Illustrator CS3 file, saved as an .ai, from my G4, on a 4gb stick. Neither WinPCSign nor Corel Draw X4 he was using would open the ai file... we kept getting an error about it being a compressed file. Is this like the old Mac to PC, PC doesn't recognize the Mac code, issue? Could it be something related to his WinPCSign being a trial version? Anyone have a workaround? Do I need to save or export it as something else?