dgreenhut:Thanks for the reply. I should have mentioned in my posting that I tried saving the file to the desktop and ran the setup from there. I also tried running setup as an administrator. Unfortunately I got the same poor result.
Never had the Winter Pack. Assume it's additional Winter themed Titles, Menus, etc Content.
Lot of different bundles/deals around at the time, with different deliveries.. Maybe Content Installer differentiates between bundled & standalone & needs to contact now defunct Pinnacle server for verification.
It could be that if Winter Pack was released with S10, it would Install into S12 with XP but not Vista/W7, although S12 does.
Don't know, I'm afraid. Never seen that Error Message posted before.
Hopefully someone-else will drop-by with a fix.
Good luck 
Anyone-else?