Request : acer aspire m3400 bios's unlocked

Hi, i'm french guy and it's hard for me to understand what you make... i'm unable to modded a bios... I think it's impossible with this MoBo...
- Please help me, i want to unlock a core on my cpu (athlon II x2 220 2.8GHz)
- Modèle Veriton M430 (acer rs880m05)
- Version du BIOS/Date American Megatrends Inc. P01-B4, 15/06/2011
- Version SMBIOS 2.6

actual bios


And an other request : if i can have more information to understand how to flash the bios of an acer aspire 5551... it's too hard in english... pictures, videos more easily... or just tell me with more details...

Thank you in advance guys