Anyway...I went to Best Buy today to ask the "Geek Squad" some questions and they just succeeded in confusing me. I told them I was building a system from scratch and then they then rambled on about flashing the BIOS. The hell...why would you have to flash the BIOS? Then I asked them about the HD I was getting...it's an ATA150 but comes default as ATA133. I know about the program to fix that, but was wondering if that should be done before installing an OS or it wouldn't matter. They...didn't know. Then I asked them about installing the actual HD, and how it was done. My idea is that you just plug everything up with the OS disc inside of the drive and then install it, then the drivers for everything, and everything should be fine. Another question is, I'll be using my old 5200 RPM 20 gig as a slave because all my old data is on it, and I don't even know the correct jumper configuration for it because it's not on the back. Now, there might be something wrong with the hard drive, is it safe to use it as a slave? I know this post is incredibly confusing and out of order, but if anybody could help me, I'd really appreciate it.