This is my first post to this forum and I am a new user of Acronis Disk Director, although I bought version 10 last October. It has been my intention to set up a multi-boot system on my home built rig for some time now. I have been slow in doing this because I lacked motivation and I ran into some snags. Now I need to bone up on using multiple operating systems for professional reasons so the motivation is there. Let me describe the hardware first: Motherboard: ASUS A8N-SLI Premium Hard Drives: 2 ea. WDC WD5000AAJS w/ NVIDIA STRIPE 931.52G (label = WINXP (C) in the first partition is 156 GB, the remaining space is unallocated) 1 ea. WDC WD5000AAJS stand-alone SATA drive (the whole 500 GB is partioned for storing my data in a single drive, label = Shared (E)) 1 ea. WDC WD3200AAJB stand-alone PATA drive (there is an active partition of 111 GB on this drive, the remaining space is unallocated, label = XP64 (H)) I have recently purchased a Seagate FreeAgent 1 TB USB drive for storing drive images. I am evaluating Acronis TrueImage software as of yesteday. When I built this system it was my first oportunity to use RAID. I took it slow and just installed Windows XP 64 on the PATA drive. I had set up the RAID array but I didn't use it for a while. Then I bought DD and installed Operating System Selector to the PATA drive (then it was C drive). Everything was working as expected to this point. I disconnected the PATA drive and installed Windows XP Pro to the first partition in the RAID 0 array. I did this because I had read about problems getting the SATA drive to boot for the first time with the PATA drive connected in forums about my motherboard. When I reconnected the PATA drive, I got a boot error (something like "cannot find a bootable device"). Disconnecting the SATA array didn't help but I could still boot Win XP Pro with only the PATA drive disconnected. I ran out of time then. I left the PATA drive disconnected and continued using the computer with only Windows XP for several months. Recently, I installed DD in Win XP Pro. Last week, I bought the FreeAgent and I used it yesterday with TrueImage (and a USB HDD enclosure) to back up the PATA drive. I then formatted the PATA drive and reconnected it internally. I am able to boot with this hard drive connected now. Then I installed OSS in a 200 MB partition I created for it on the RAID 0 array (NTFS Active, label = OS_SEL (K)). When I rebooted I got the boot menu as expected but the USB mouse didn't work. What was worse was that Win XP Pro froze in the startup screen. I tried booting in Safe Mode and it froze after loading Windows\System32\giveio.sys. The only way I could start Windows was to press F6 to bypass the boot menu. I had to uninstall OSS. I obviously have a lot more to learn. I could use some help. Here are my objectives: 1. Have Windows XP Pro, Windows XP 64 Pro, and Ubuntu Linux running in multi-boot configuration ASAP. 2. Have the option to install other operating systems in the future. 3. Most importantly, avoid screw-ups as this is my only PC at this time. Any help would be greatly appreciated.