my motherboard asrock alive nf6g vsta

im just wondering if i could some how get a cpu upgrade
AMD Athlon II X4 640
to the above cpu

ive checked the manufactures site and the cpu isnt listed there but it says am3 cpus will fit am2+ boards ( even tho its not listed)

also the bios on my motherboard the last time asrock up[dated was 2008 ( which isnt good)

im wondering if theres a way to get around the motherboard to get the cpu to work

thanks in advanced