So I am building a computer for a friend, and my brother is usually around to help me out, but this is the first one i am trying to build all on my own. anyways, its got an ASUS P5NSLI mobo, and when i first booted up it said !!error awdflash.exe is not found with cd rom!! when i was trying to boot and install windows. it also said "BIOS rom checksum error" so i made a ms-dos start up disk, and copied the asus award bios flash utility and my mobo's most recent bios bin file(which i renamed to P5NSLI.bin) onto the boot disk. when i started up the computer it checked the cd drive and failed, and then checked the A: and booted automatically into the flash utility.

It asked File Name to Program: and was blank for a second, and then it automatically typed in:
PN5NSLI .BIN I dont know if the spaces between the name and the extension mean anything, but i know that the actual filename has no spaces. anyways, after the filename comes up, the flash utility hangs. It says "Message: " at the bottom, but doesnt have anything there. "Enter" and "Y" dont do anything.

I cant get into any kind of BIOS setings to reset to default, and i've never had to do the battery replacement/reset thing i've been reading about. again, this is a new motherboard. Also, I do not have the support CD that should have came with the mobo. I bought it OEM from 3btech.net. So i had to download the awdflash utility and the 1801.bin file from asus.

I dont know what else to do here. Thank you for an help you can give me.