Hi , I have been succesfully running os selector for some time . Heres my setup and then my problem . My hard drive has 3 primary partitions . The 1st partition is windows xp and thats where disk director is installed . 2nd partition is also XP . 3rd partition is vista . Its all been working in harmony . Today I created a 4th partition (logical) and installed vista . I then reactivated OS selector and it works fine . The problem is I can no longer boot the windows xp on partition 1 . I get a message after I select it saying disk error . My 2nd partition XP boots fine . The 3rd parition vista has been hijacked by the new vista so when I select it the new vista boots up instead of the original vista . I haven't edited anything or tampered with it yet in hopes I can get some guidance here . It may not even be possible to make this work . I do have current images of the1st 3 partitions so I can easily restore back if I have to . I'll be glad to email any files to anyone to view and advise . I did notice a few new files added to my 1st partition like grldr . I suspect the new vista on the logical partition has taken over . Also the new vista boots fine but shows up as unknown operating system .I'm sure my procedure was wrong but I want to mention the 3rd vista partition was about 55 megs . I reduced the size to 26 to make room for this new partition but never did reboot the old vista . The size differential could be a problem if oss didn't update the new value . I have included the prior working bootwiz.oss from the win xp partition one that worked properly before i changed anything . It is bkupbootwiz.txt . It might not reflect the size change of the vitsa partition . when I boot vista I get a sub menu thats says vista or earlier windows . When I boot xp on the 2nd partition I do not get a sub menu . It boots normally .Thanks to anyone who can help me .