Mac Sixtyforce help.

So I have no idea what's going on.I downloaded Sixtyforce. Opens perfectly.
Downloaded a rom. (ends in .7z)
For some reason whenever I download it and I try to open it it says VMware Fusion failed to launch. Now I know I bootcamped Windows on my mac but I have no idea what to do to get this rom working.Any help would be amazing.

you need to extract the rom from the .7z file.