I have prosper202 installed on hostgator, although it didn't go smooth on installation. Apparently you have to talk to hg support so they "whitelist" ??? your script. It took only a couple of minutes, since their support kicks ass, but still ... After that, so far so good.
2 bgallotte, you can't install prosper202 on a subdomain, tried that, it has to be installed in the root dir, found that out after reading their instructions.
Although, it's worth it.