Bios Mods -The Best BIOS Update and Modification Source

I'm going back and forth a lot between two ASUS .CAP bios versions on my X79 system. I've updated the oroms on both bios versions but there are a few annoyances in the bios itself that I'd like to tweak. I can't find a tutorial or thread on these. If anyone can give a few tips - I'm newish to proper bios modding but a few pointers explaining what to look for or do, might be enough. (I've done assembler + debugging on a different platform so I'm not completely naive, just not x86.)

The bios can be opened by using UEFITool 0.17.10 to extract the rom from the .CAP, then UEFITool and AMIBCP 4.53.0050 to examine and modify the rom strings and structures. My initial mod wishlist is:

1. When I look at the rom in AMIBCP the menu defaults (failsafe+optimal) are clear and many of them show values which I can modify. But a lot of items don't have a value shown next to them and then the AMIBCP interface doesn't seem to let me enter anything. Is there some way to modify their default values? One of my targets here is the default settings when re-flashed, for example "splash screen=disabled" and some device settings which I always have to change manually after flashing.
   
2. The bios detects and blocks rollback to earlier BIOSes. I can use rear port Flashback instead, but it's not ideal. I'd like to mod the code segment that detects and compares versions so it doesn't block flashing a new bios if the version is older. Way neater. Presumably this is as simple as finding a jne or jeq and changing to a jmp or something, but it would be the first time I've tried bios code modding. How would I do it?
   (I figure, how hard can finding a jump instruction be really? )

Thanks!! And great forum

My bios download link: http://dlcdnet.asus.com/pub/ASUS/mb/LGA2...S-0801.zip