E.V.O.

Just a thought, is there no way to extract the ROM containing the code that controls the pull-ins from say a X38/X48 or different P45 BIOS and insert it into the MIIF 1901 BIOS?

I bet the X38/X48/P45 are almost identical when it comes to the pull-ins which would mean the code should work when pulled from one BIOS to the next (X38/X48 ---> P45). Since the MIIF has a dual-bios design it would even be non-risky to try it out.

The other option would be to convince some Asus engineer so he/she can earn a little on the side should they choose to fix the MIIF BIOS in their spare time - especially as they have access to all the tools and resources at Asus making it a lot easier for them than going the reverse-engineering route as depicted above. He/she would actually be doing Asus a favour even if he/she was found out at Asus so it's not as if he would be risking his job - and consequently it's not out of the blue to think such an approach to getting the MIIF BIOS fixed is out of the question.