to all the guys that are stuck with opening the files.
i used 7-zip to zip the roms...
its free for download, try that, it works for me.
and im sorry for the hassle... i must have set it to compress it as zip and not 7z.
here is a link:
http://downloads.sourceforge.net/sevenzip/7z465.exe
let me know if that worked... if not i probably have to re-upload.