Help!!! (FDISK, New HD etc)

[Minty]

I have a 40Gb Seagate HD that I have placed straight into a Packard Bell PC because the old drive is f***ed. When coming to booting up the PC it says it doesn't regonise the HD (Invalid System Disk or something).

The PC originally came with 2 Master CDs that allow the PC to format etc, but I can't get these to run when starting up, I only seemd to be able to use them in Windows.

All I want to know is from fresh how do I install Windows XP or these Master CDs.

I tried using fdisk but my knowledge on fdisk is bare, I had no idea what any of the commands are.

Any questions please ask, and any information is helpful.

I have until 6PM to prepare myself to go back infront of the PC and fix it.

Please help me

Thank You in advance

Minty