Just thought I'd tell all you people who have the A7M266, that it officially works with the AthlonXP now, with their latest patch.
AMD® 761 Chipset
A7M266 (5 PCI, 266MHz FSB, 2GB DDR SDRAM support, UltraDMA/100, Optional 3Com® LAN and Cmedia® Audio)
- BIOS Upgrade and Road Map ...