...I'm trying to find out the capacity of the old drive, I really don't know it. A technician put in and I don't know what he did...
Open case and
look at old drive.
Read Reply#5 above. I guess you don't understand what a "boot disk is". Study info at this website. If you're not comfortable about doing it yourself, you better find someone to do it for you. You must create a bootable floppy disk and copy the BIOS update program to it and execute it from the boot disk. BIOSAgent runs from Windows and will probably say:
08/04/1999-SIS-628-P6SET-MLC-00, which we already know. I gave you the BIOS upgrade link. I've done all the work for you except for flashing the BIOS.
You've got the computer, you have to do it, or pay someone to do it for you.