Well it wasn't second hand i brought it from the company, And i found the website, and i searched high and low, for that thingy about the pins and stuff.
Well there is successe at last, i spent 4 hours but i have got the computer to work.

I had the thing plugged into the wrong cord, and i did that bios thing were you press del at the first screen that appears when you turn the computer on, i did that auto detect thingy.
And BINGO i got a new drive,

So the next thing is, I have got the copy of linux red hat 9.0 Do i just put the CD in and install it?
Or do i have to install it another way?
Because my boyfriend won't tell me, he's sorta pissed that i got help from you helpful people,
SOrry if i'm being a nuisance.
Hang on i will search through the tutorials here first,

Sorry, anyhow thanks to everyone, and everyone was correct with there information.
Gee i LOVE THIS PLACE!!!!!

Cheers