Bios Mods -The Best BIOS Update and Modification Source

Hello,
I have problems updating the BIOS of my ASUS CUV266-DLS board with the Tualatin microcode tB1 stepping (CPUID 06B4).
http://www.cpu-world.com/sspec/SL/SL6BY.html
I tried the manual for the ASUS P2B-DS and the P3B-F, but it does not really work that way.
This guide here:
http://www.tipperlinne.com/bios6b4.htm
https://www.mrufer.ch/pc/tualatin4_e.html

It crashes every time I merge the BIOS file with the new cpucode.exe with "not enough space".

The last BIOS can be downloaded from ASUS:
https://www.asus.com/supportonly/CUV266-...Desk_BIOS/

The BIN file for the microcode tB1 stepping (CPUID 06B4) can be found here:
http://www.tipperlinne.com/06b41001.bin

Here are screenshots of CPU-Z:


Can someone help me to build a bios with integrated microcode of Tualatin?

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