"the oem software"
you mean a windows dvd?
if the dvd drive is first boot device it should boot from that windows disc and start the install .
Are you sure you hit F10 to save the bios changes you made?
YEs I checked back in the Bios and it shows the dvd drive 1st to boot. Windows Dvd--is that provided with the Mobo or vthe Vista software I bought?