Metal Gear Solid Legacy collection

Hey guys, on my pc, the ps3 emulator (RPC3) won't allow itself to process the MGS legacy collection. I have updated the firmware and attempted to download the currently available version of the game off this website, but it won't do anything after I try. I've redownloaded the game twice now and it still doesn't work. For reference, the file keeps forming into a .7z, so if that helps, please help me