You could buy a used computer, they have some cheap used P4's at intechraoutlet.com.http://www.intechraoutlet.com/rbwww/home/
ONLY alternative to get that lappy running decently would be windows 98
I have a Thinkpad t41 with 512 megs of ram and XP Pro is as slow as molasses with it. I might install Win2k.