Hello, i have dualboot os. win xp pro and win7 ultimate. my original partitions letters is like that: c-win xp d e f-win7 after i installed win7, when im using win7 the partitions letters had change: f become c - win7 c become d -win xp d become e e become f when im using win xp all the partitions letters come back to original. how can i keep the original partitions letters on win7? tnx david.