I don't know if this has been posted, but there are two Soft FSB plug-ins available for the KA7. One sets the FSB, and the other sets it in 1MHz increments. I have tried it out, and it works well, and is handy for trying new settings in Windows. It is also great when used with the working version of H Oda's WCPUA2 to adjust the cache (the version with no expiration date, not the un-released BIOS version) from the desktop.
It is here:
http://www.geocities.com/ABITKA7/
It is here:
http://www.geocities.com/ABITKA7/