Hi Myles,
I tried CBFS on M2V-MX SE. So far it worked (Seabios + gpxe + vga rom) Well done all ;)
It seems that the ROM SIP area for chipset is OK. Is there a way how to verify that it will be always so? (Its in last 128B of flash)
I only ran to one issue, did not investigated yet. I had this rom as above and I removed the VGA rom and system stopped finding the seabios.
Dont know maybe there is smth wrong with remove,
Rudolf