Ok, I have an old pc with,
P75mhz or something close to it
64mb
Dead CD Rom
2 Harddisks, 0.5 and a 10gb

Ok... here goes...

I opened up the computer for the first time the other day, and I immediately crapped my pants. There were those really wide wires going every. First of all, I want to replace my CD. I haven't done any real upgrading before, so can anyone tell me where I should I plugging stuff in?

I know there is the really long cord, and I think there is a small one as well runnin from the back of the CD. Can I just unplug them and plug them into the new CD.

And here comes the hard one. I want to remove the 0.5 gb harddrive completly, make the 10gb harddrive the main one.
At the moment I think the Cd Drive plugs into the 0.5 gb and that plugs into motherboard. And the 10gb must plug into the mother board as well....

Ok so can someone point me in the direction of someone articles on upgrading? Or tell me what I need to be changing.

Thanks in advance.