Yes we change NB FID using Bar_Edit or WPCREDIT for a long while now
We change CPU FID, CPU VID and NB VID using MSR Editor/Sams MSR Tool aswell.
You can do it on any AM2+ supporting board, the registers we change are within the CPU.

Abit board is 770, MSI board is 790FX.
Both are very different categories, different price, different offerings.
Abit 770 is tons better than the MSI 770/790X no doubt.
MSI 790FX v1 has far less problems with Phenoms, much better support/compatibility but also less BIOS options for oc unless you go to 1.13b, which is one of the best performing/overclocking BIOSes I've seen. It has everything you need.

They are different boards, I would wait for a good BIOS for Abit board if you're planning to get that with Phenom B3, but for less than the price of GBT 780G, it's one excellent price:perf board!

-MSI board is the best 790FX offering in terms of price:perf at the moment, without a doubt in my mind. Best RAM clocker aswell. But I would not use it for over 1.50v load 125W CPU clocking, go DFI/ASUS 790FX for that.
-Best high end clocking, over 1.5v is DFI/Sapphire and ASUS 790FX, but all three are too expensive for what they're worth, not worth their price and only better if you go over 1.5v because of the PWM and because of better oc BIOS options.
-ASUS 790FX is far more stable than the DFI, DFI just has too many issues and weirdness, like always.
-Abit, IMHO, is the best 770 I've come across so far including the ASUS M3A coming second - they just have to resolve some major BIOS issues: RAM/NB FID. I would also limit the voltage to sub-1.4v with 125W quads personally.
-ASRock 780G is better than GBT 780G aswell, just to add and GBT 740G is not good, to say the least.

I have hit 224HT with AX78 fine so far, all stock voltages: http://valid.x86-secret.com/show_oc.php?id=355810
Haven't tried more because of bad BIOS.

Where the heck is cutie nowadays by the way?
Did he go crazy for that girl in his av or something?

***I know you're reading mate***