Clone dell optiplex 7020 BIOS

Hello,

I like to clone the BIOS from a VALID dell 7020 to one where the product number is missing.

I have succed by desoldering the 2 memory flash chip 32mo and 64mo, flash the memory and sold them again. But this is difficult and possibly destroying the motherboard (using 350 ° hot gun).

I like a flash utility to do so.

I need help !

Regards to all