Your trying to installl Mandrake 7.1...
On a 2.4Ghz Hyperthreading P4!!!
My god, I do believe you are completely insane.
Go get/download/purchase a more up to date distro to dual boot the system with and try that again. You should be using at least a 9.0+ release if not the newest 10.0.
Better yet, go pick something like SuSe or Redhat so that you have a decent running system when your done with good software selections...
Don't give me none of this.. "But I can't download/afford a newer copy of BLAHBLAH distro"
Last time I paid for a distro on cd it cost a whole 3 dollars for all 5 cd's. There are plenty of cheap redistributor places out there.