I have windows xp(pro) and redhat 7.2 on one drive. I always use fdisk and set up the partitions manually. It sounds like u need a bootloader, but first are u creating two different drives (c: & d: )? If you are one of the operating systems will need a boot disk or cd. If you don't want to boot with a floppy or cd partition the drive and put bootloader in the mbr (master boot record), it will prompt you at the beginning of the boot sequence. I prefer lilo or grub, the only problem with that is that one of the operating systems will have to be some type of linux. If you decide to go that way then the native partitions for linux including the swap sits on a non dos partition. I know this may sound difficult but its not, drop me a line and i will walk you through. Like everything else its a matter of trial and error, tweaking, trial and error again