Leading into my question--->Did you know that when you install a new MB windows XP Pro recognizes it as new hardware? Sound like a dumb question, but get this Windows XP Pro has a built in feature that if you install more that three new hardware items, it will make you reinstall or repair Windows? Security, Security. I found out installing a MB is a minimum of 13 new hardware items. What a nightmare. Lets just say I purchased HOME version and happen upon the PRO version. So, in fear of losing my data on my hard drive I purchased a new hard drive. So, finally to my question. Whats the best way to configure two hard drives? Presently, I have one as the master and the other as a slave on channel 1. Should I have just windows on one and all of my programs on the other. I heard you should only have the master with no slave, for speed or accesibilty. Anyway I have channels 3 and 4 open with the option of running RAID, but really do not understand the whole RAID thing.