Windows XP won't install

[Nash]

I'm running Windows Vista RC2 and I'm fed up of it so I've tried to reinstall XP SP2. I stick my bootable CD in at launch and it gets to the bit where it says press any key to boot from it then it says it's inspecting my hardware but just hangs on that. It's worked in the past Any ideas?

 

[Ronaldo]

HDD or Ram issue

 

[Nash]

Any idea what kind of issue it could be? They seem to function perfectly well in normal Vista operation.