Bios Mods -The Best BIOS Update and Modification Source

I dont find unlocked bios, i find only slic *.bat...not work, and not usuable for me
SLic is only for windows activation?

I know how to dowgrade bios, used by original Asus WinFlash /nodate
I need unlocked hidden menu CPU CONFIGURATION, and THERMAL CONTROL in Advanced Menu...
I see this items and more others in AMIBCP 4.53.0050.

But problem:
I save bios, and orognal winflash say: invalid bios, i use "/nodate" - invalid bios too.
Okay I use 10 DOs versions afudos in DOS (bootble USB flash pen)...I use Amiflash enginering edition = make freeze.
Okay I use Afuwin, Afuwin and afudos 3.04 say error 43 unable to delete flash.
But read flash work. when i use saved bios from read when I flash it - say error 3 - bios file not match existing bios...ouuu why?
Okay i look for very interisting item = saved bios X55AAS.415 have different file size than saved bios file same type 415.

hm, what I do? have asus bios special CRC verify? or? i dont know why moded bios dont work, and asus winflash know It If bios is moded ad say invalid bios type.
I wanna only overclock my celeron B830 from 1.8Ghz to 2.3Ghz, using change bckl from 100 to 133Mhz.
But I need to change in bios, I dont want patch, because if not work- laptop dead. I use load cmos default, (turn off battery to reset cmos data)
I have before MSi CR600 with 45nm celeron, i Overclock from 2x1.8Ghz to 2x3150Mhz, but freeze in benchmark. Optimnal frequency was 2x2.86Ghz, I change FSB from 800 to 1333. work pretty good, I overtake same 4 quad core CPUs from AMD and Intel Quad core. But Laptom increase TDP from 23W to 55W.
On my asus I wanna only little overclock from 2x1.8 to 2x2.3 plus minus

Thansk for any help and tips how to make right bios mod
Sorry for my english

Hi!
On Asus site there are only bios UPDATES but it's a problem to find the dump. If you want to modify or update your bios i advice you to do it under Windows. And yes, they have different lenght- the updates are 2.5Mb but the bios physical chip is winbond 25Q64FVSIG and it is 8Mb. Seems that your ASUS X55A mounts the same motherboard as F55A notebook, "X55A MAIN BOARD".
Ciao!
P.S. Could you upload your saved bios here in order to have an 100% working dump for this model? Thanks!

Hello, rom bioses have 6MB
Few tested bioses but original asus, i use /nodate

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Hidden items, modding using from default tu USER, to see hidden items, problems with flash modded bioses
Thanks

I Unlocked Bios, to flash use FPT in dos, only this program alowing flash
but unable to change DIVs, unable to change BCLK
able to change GPU OC, memory timmings

Bios is v415