Please help! Here are the two things I tried, step-by-step in a list. Note: XP and Win8 RP are 32-bit, and I have a partitioned SATA HDD.
SETUP.EXE via Win8 RP shows an option for installation, but is greyed out.
Booting from CD:
1) I inserted the installation CD and hit a key when I was prompted to boot from CD.
2) Many files were being copied and I was prompted to hit F3 to continue
3) With the original disc, I received an error saying "Setup did not find any hard disk drives."
With a new disc (https://www.howtogeek.com/howto/windows/resolving-setup-did-not-find-any-hard-disk-drives-during-windows-xp-installation/ -- I got SP2, no other changes) I get a corrupted sys file error.
Thanks for any help!