any help would be great, i have mod all but a ver 1.6 and for some reason i cant make a 512k file with the M8 256k bios with X2bm 2.2 it say's in the read me file it has support for it but, it dont like the bio's if anyone can tell me anther way to make the 512k so i can load it on to X2.6 would be a star.

Get a copy of EVtool from the "usual places", you can resize the BIOS and save it as a 512k BIOS. Also remeber you need to flash a 1024k BIOS (FlashBIOS 3.0.x for the first 512 or any other BIOS then M8+ on the other 512) on the 2.6 because the BIOS needs to be on bank 2 and it starts at the beginning of flash memory regardless of the switches.

Cheers made the 512k bio's but not sure what you mean about loading to 2nd bank.
there are four banks of 256k do you mean load M8+ on to banks 3 & 4 with the switch set to 2.
and does it matter what Bio's i put on 1 & 2

Thanks for you help.

There are ONLY 2 bank X2BM says there are 4 but in reality there are only 2x512 banks, and due to M8_16+ will only work on Bank 2 you need to make a 1024K BIOS because the chip ALWAYS starts flashing from bank 1 regardless of the switch set-up. So to flash your chip you need to have a 2 512K BIOS's then put the EvoM8_16+ on bank 3 in X2BM (it will fill bank 4 also) then put any other BIOS on bank 1 (it will fill bank 2 due to it is a 512k BIOS). Here is an example (how it will look in X2BM)
Bank 1&2 FlashBIOS 3.01 or 3.03
Bank 3&4 EvoM8_16+

Then just set the switch to bank 1, Unprotect select your flashing method on the FlashBIOS screen and your good to go

that and you need x2bm v2.3 ... see link in sig