Is there a way to dual boot to XP, after installing 7?

YupYup said:

Can you make it so the space is unallocated?.

Yes, I did. After I did I tried formatting it or whatever, and that's the error I got.

Dell model number as in "Dell Inspiron 530s" it should be on the case somewhere (back/bottom usually).

Dimension 4400

Explain ide mode? well in layman terms it will let XP see and use the drive without having to load extra drivers. Different bios name it differently like (ide mode, compatabilty mode , legacy mode) and OEM's don't give you access to all options so you may or may not have a choice.

So where do I go (specifically) to try and test this out?

YupYup said:

Dimension 4400 does not have sata so try installing into the unallocated space and if the problem still exits it may be the "Reinstallation CD".

Well unless the installation would fail because the space (which I wasn't even given a chance to pick yet) wasn't unallocated, then I guess it's the CD.

So... I guess I'm just out of luck then.