My AC Master of Arena can\'t be extract. Really2 need help.

Hi, i just extract Armored Core Master of Arena, but the files can't be extracted. I really2 needs helps from all of you guys that have experience in this problem.
I really like this game.
Please reply my topic ASAP, thank you very much for your help GUYS!! ;)
Post Merge: [time]1298561945[/time]
I'm forget to give this information,
i run the game in my laptop PC.
using emulator epsx 1.7
i try extracting the files using 7zip
i'm downloading the files from romulation.netplease reply my topic, thank you very much Guys! ;D