Its a EMachines OEM D845GVSR Intel Seabreeze MOBO. The same that I replaced. No Installation disk. My hard drive has a OS on it, Windows XP Home. I've been working with EMachine support also and they said the installation disk was not needed. This is how they told me to add the MOBO:
Put the disk 1 of 3 restore disk into the cd drive, Boot computer, At startup menu select "Boot to Command Prompt", at command prompt (A:\)?? type FDISK, Enable Large Disk Support (Y), Delete partition or Local DOS Drive (Y).
That's when all *censored* broke loose! Whenever I go farther it tells me Unable to access disk drive 1 and BIOS shows no HD detected.