Background first. I have 1 hard drive hardware. It's divided/partioned to 4.

It's like this before I installed Knoppix into hard drive:
1-XP
2-Files for Downloads
3-Files for Downloads
4-Files for Downloads

I wanted it to be:
1-XP
2-Files for Downloads
3-Files for Downloads
4-Knoppix

But it became:
1-Knoppix
2-Files for Downloads
3-FIles for Downloads
4-Knoppix

So my XP is gone. I'm fine with that, I "can" install again. However, I can't even access it! Like when I go to "File Manager", it doesn't show it. I mean.. It doesn't show #1. It shows 2-4.

Also. I'm using Knoppix from the CD right now. How do I boot using my hard drive(probably #1)... I've tried to google, still no luck. I don't really understand this much. New to Linux.

So. Real question is... How do I boot using hard drive and how do I make it so the computer recognizes #1 so I can install XP?