Disk 1 = 750 7200rpm (C boot, system, primary partition. I'm thinking of adding a SSD as a boot drive with a fresh install and a 2TB green. Here's my question. How does Disk 0, Disk 1, etc. matter?

We have already seen how to upgrade Windows 8 to Windows 8.1, in our last post. Now we will see how to install Windows 8.1 on a separate partition. I did not want to upgrade my existing working ...

Just a stab in the dark, but did you try inserting disc 1? IIRC, the BG2 install takes the 1st disc again after going through all of the discs once. Maybe it just said the wrong thing.