I've been experimenting with this yesterday and today. I have 4 hard drives in my system. sda is a 160G I planned to put FEdora on. sdb is an 80G I planned to use for XP. sdc is an 80G I planned to use Vista on. sdd is a 250G I planned to use for storage. I tried only hooking up sdb with which to install XP. It installed fine. I then unhooked sdb and hooked up sdc and installed Vista. It went without a hitch as well. I then unhooked sdc and hooked up sda and installed Fedora. Fedora looks awesome and installed without problems as well. I then hooked up sdb and sdc and made sure fedora was still booting. It was. I tried modifying my grub lines to include the other two OS's I wanted to boot. This failed. I found a post on fedoraforum.org dealing with hiding and unhiding partitions. I tried with with my hard drives to no avail. So I wiped all three drives again, and tried installing XP first on sdb. This installed but wanted me to have sda hooked up to dump some boot files to. I then tried installing Vista to sdc but it wouldn't install there with the three drives hooked up. I wound up installing Vista to sda and I have yet to install Fedora to sdc. I'd rather not install all three OS's to one hard drive, but I guess I could do that to the 250G and then use the other drives as data storage. Anyone else have suggestions? Thanks. -- -=/>Thom