trouble flashing bios with another mobos bios

[sianlogic]

Whats up guys! How you doin? I'm have a nforce 150 motherboard its a gigabyte k8n pro (ga-k8n pro) and I'm trying to flash it to the bios of this motherboard called Gigabyte GA-K8NNXP-940 . Lots of people have had great success using this bios becuase it has much better options for latencies ect. than the giga k8n pro bios. Anyways when i try to flash it with the awdflash program or the flash879 i get the error code of product ID does not match , so the bios does not update. Any idea how to get around it. Ive searched all over the web for about 2 days now and can't find anything. Are there any switches I should use in the command line of the flash programs? thanks alot guys for your help