The 1503 error message is about your disc not being inserted, so first off, I'm gonna have to ask you, have you made sure to keep the ISO file mounted in DAEMON (or whatever you use) WHILE running the game, and not just during install? The game requires the disc to be inserted in order to run. You could always use a NOCD patch if you find one though, I think I saw one floating around somewhere on the internet, but I don't remember. You're gonna have to look for it on your own. And about the REALLIVE.exe...eh, ye, you kinda need that, so if you deleted it you're gonna have to redownload it again. ┐( ̄_ ̄)┌ Sorry mate. No other way around it.