Hi, somebody pls. help me ! I have a notebook and like install two OS on two primary Partition (Two XP Pro). I have partitioned with Acronis Disk Manager Two 10 GB Primary Partition the first is Primary and active the second is Primary and hidden. Long time ago I used the Power Quest boot manager and this do it so that when the first OS run the second was hidden (cant see from the windows), and when the second OS run the first was hidden. This run great because the two OS cannot see the another, but i have SATA Raid HD and the PQ boot magic dont working with disks. I have tryed the Acronis boot manager (look wonderfull) but didnt working so as i need . I can hidding the second primary partition for the first OS but cannot hidding the first partition for the second OS (the hidding checkbox unavilable by the first primary OS), and when i booting the second OS i can see The first primary partition with the first Windows this is dangerous because i can delete files or by installing software make miscallenous problems. It is possible hidding for the actually running OS the another Primary partition (i plane for the future more OS to install for more primary disks)? Thank you the answer and sorry about my wrong English !