Xeon install on LGA 775 Need help with modding bios!

Hello, I need help with instlling Intel xeon5460 on my 775 lga mother board. More specific I need help with modding BIOS. I completley don’t know how to do it. I have motherboard from HP Compaq dc7900 Small From Factor computer. I don’t know how to mod it and how to update BIOS. Please someone help me!

Read…and no more miracles here, dont ask for what cant be done.
[MOD] LGA775 Support For LGA771 Xeon CPUs | Overclock.net

Xeon X5460 10676 (SLANP) 1067A (QFTX, SLBBA)

Both mcodes (2015) on latest bios v01.27 Rev.A (sp73584.exe)

If it doesnt boot, with the required modifications linked, its HP restriction deep inside bios code.