I burned Halo PC for a backup disc in case I lost the real one. I downloaded all of the FLT's and extracted them with WinRAR, then used Nero to burn the image. The problem is, after it installs, if I quit, I can't play anymore. When I try to open it, it says "please insert the correct CD". I have to install it again if I want to play. I don't know what went wrong, so please help. It is SD 2.7 protected. I opened the NFO that came w/ the download w/ wordpad and read everything it had, but it didn't say anything about this problem. All it says is this: Installation Information: ========================= Just extract the archives and burn the .cue file with your favorite CD-Recording software. On another note, I only can't play it after I download the new patch. If I don't download the patch, then it works fine, but then I can't play online, which makes it pretty much worthless.