I have the same problem as ike412, but I don't want to format my hd since I had installed Vista and I don't want to spend a day to install Vista and all the drivers and softare from the beginning.

Is there any other way to boot into OSX86 without having to format and partition the HD. When I have the installation DVD in the drive I can boot to OSX without any problem, but without I get a "Chain Booting Error" if I use the vista bootloader, or if I set the OSX partition active I get a "Missing Operation System".