Mike, I hadn't tried that yet because I successfully used that drive to install V5.1 in the first place. I had also made disks on multiple drives with no change.
Having said that, nothing has worked so far to get SP3 installed so I might as well give that a try. Thanks for that suggestion.
@Phil, the above covers you input also.
I certainly appreciate both you guys playing the d8b "game" with me.
Will try the drive swap tonight.
Thanks, Rex