Dweebster57, a few points:
I don't know how you got your "stripped down" Windows XP, but it may not have been legal. This site operates a strict "no help for piracy or breaking MS license terms" policy, so unfortunately you are on your own in that regard.
Quote from a moderator at the EeeUser forum:
Tiny XP is illegal. Any further discussion of it will get this thread locked and people advocating it may be banned.
However, ignoring the OS for the moment... (Others will decide on this)
If you were able to use Boot Nuke to wipe the OS on your daughter's computer, then at least one HDD was installed and working.
If you were able to load the "stripped down" Windows XP, then the same applied.
If things were alright for about a day and your daughter was able to surf the web then likewise.
So your daughter found she could not surf the web. That made you decide to reinstall the OS from CD? Why?
Anyhow, the bit that confuses me is where you say "power cables that say Master and Slave". The power cables for IDE hard drives end in 4 pin white Molex connectors that look like this
It does not matter which one goes on which drive. Do you mean they have "Master" and "Slave" written on them? I have never seen this before.
But the big riddle for me is that your badass pirate Windows may be capable of many things, but it definitely cannot unplug cables overnight! Either somebody has opened the case and disconnected some cables, or else you are confused about what is what.