Tigs,
I guess you didn't read the post above this one.  AH works great with both versions of XP using NTFS file system.
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 I have absolutely no problems running AH on two boxes one with GF3 and XP Home and one with GF4 and XP Pro, in fact my frame rates went up when I upgraded from ME. I run 30.82 drivers on both boxes and get FPS at monitor refresh rate on both with Anti aliasing x 2 on. 1024x768x32 on GF3 on 19" monitor at 100 refresh rate and 1280x1024x32 at 85 refresh rate on 22" monitor with GF4. Both show in AH as primary microsoft 3d video card and I have no problems in any game. 
Athalon 1.4 
Asus A7n266c 
Visiontek GF3 
2x256 Crucial 2100 
SB Live Value 
Plextor 16x10x40 
Seagate 30 
XP Home
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DJ229 
2100 XP / AX7 
MSI K7N415 
2 x 512 Crucial 2100 
Plextor 40x12x40 
Seagate 60 & 40 
Leadtek GF4 4400 
OB LAN & Audio 
Antec 1080 w 430 PSU 
XP Pro