What's the size of your partition?
Or is your disk just 1 partition of 140GB?
You could anyway try to delete the (or all) partition and then just use install Windows on the 140000 MB's you see on the screen.
The second time make sure your boot from your harddrive. When the install files are copied, you best take out the XP CD, and put it in when the setup asks for it, the other way is to change the Boot configuration in the BIOS when the files are copied.
Oh and, I'm a Christian so I was wondering, hope you understand
Bluefish