Do you have a reference board where BITS doesn't fail on MSR tests? Then I could easily take the microcode patches out from there. As for your requests the easy way is this: http://www.rebelshavenforum.com/sis-...132;p=1#000006
Add a new menu (which is real to do) and then write an optional ROM that will set registers the same way you do with your tools (MCHbaredit analogs from what I've seen) but integrated in BIOS. So it'll apply settings after POST but before Windows. The hard way is to disassemble the main BIOS module and write what you want there. I'm not a programmer so I can't help with this one definitely.