hmm well if those options aint there i would think that the bios installed is restricted by P/B known as 'bios locked'. thats how they make lots of money by charging ppl like you £50 for a £2 disc!
The cheapest option open to you is to do a clean install of xp onto your IDE drive and just use that, (not forgeting to alter the boot settings in the bios). If you find that 160gb is not enough you can always buy a larger one at a later date, up to 750gb soon to be 1tb.
Sorry i couldnt help more, its just difficult over the net lol. Good luck