The d/l you are referring to I assume is the Hardware Compatability List,
which is not complete and is preferential towards newer computers.
http://www.microsoft.com/windowsxp/home/evaluation/sysreqs.asp
Here's What You Need to Use Windows XP Home Edition
a.. PC with 300 megahertz (MHz) or higher processor clock speed
recommended; 233-MHz minimum required;* Intel Pentium/Celeron family, AMD
K6/Athlon/Duron family, or compatible processor recommended
b.. 128 megabytes (MB) of RAM or higher recommended (64 MB minimum
supported; may limit performance and some features)
c.. 1.5 gigabyte (GB) of available hard disk space.*
d.. Super VGA (800 × 600) or higher resolution video adapter and monitor
e.. CD-ROM or DVD drive
f.. Keyboard and Microsoft Mouse or compatible pointing device
marx404