The MGO Beta was only available on the PSN store for a short time due to the short beta testing.
I found that out the other day, I was able to get the Konami passcode easy enough, but the link on the PSN Store was gone. Damn. So I just tried the F@H/ProxyServer/PSN Links and installation went great, but when booting up MGO, I got the 'Copy Protection Invaild Error'. Oh well I'll just wait till it's released in June.