PowerVR have posted new official drivers for it's KYRO/KYRO II graphics cards and it's version 9.0031 (Release 1.3.1)! These drivers are DirectX 8.1 compliant and feature WinXP support:

v1.3.1 Windows XP (Build 1.00.09.0031) 7.06MB

v1.3.1 Windows 9x/ME (Build 1.00.09.0031) 7.14MB

v1.3.1 Windows 2000 (Build 1.00.09.0031) 7.06MB

v1.3 Windows NT 4.0 (Build 1.00.08.0162) 6.30MB Additional fixes:
- WorldCraft 3.3 (Half Life Editor) is now working fine.
- Minor bug fix for the HalfLife TV mode.
- Red Faction fixed.
- Return to Castle Wolfenstein speed-up.