Bios for a Soyo Dragon kt400 ultra

[LeftSide]

I have a Kt400 ultra and a Barton 2500. I know I can take the barton up higher (from 333 to 400fsb) I have done it on a friends computer. But this stupid via chipset doesnt support 400mhz fsb. I have to bump up my agp and pci bus WAY up. Does anyone know of a bios flash that would support the higher bus? I have the latest from soyo, but I was wondering if there are any *special* bioses out there that you know of??? I can manualy set it up to 400, but I need the higher pci agp divider...