OK, you've got a "clean system," and I assume that you have not had a "trial" version of CS3 installed on it, right?
I'm going to throw out some ideas on Adobe program installation. These are distilled from various Adobe fora. Some might NOT apply to PrPro, but many might.
1.) download and install the lastet Adobe Flash Player (some Adobe programs need it to install properly)
2.) download and install the latest Apple QT Player (some PC users get by just fine without it, but a few Adobe programs want to see it.
3.) download and install the latest video and audio drivers. Update any firmware.
4.) turn OFF ALL anti-virus, spyware and pop-up blockers (including any in IE, if you have it, or any other browser). Also turn off
Windows Messenger and Windows Indexing.
5.) make sure that you are logged-in as an Administrator
6.) as you got an installation error, I would Remove both Adobe programs (Add/Remove Programs) and also run Adobe's CleanScript. I think that
this might be better than doing a Repair Install, though you can certainly try it first.
7.) if it still fails, try an installation from a Safe Mode boot. I *think* that this will only work for PS and Illustrator, and NOT for PrPro.
8.) if it still fails, and I hate to even suggest this - remove the Matrox card and all drivers, and try again. Given your efforts to get the box up and
running WITH the Matrox, I'd use this as a total "last resort."
Good luck, and I hope that something, prior to #8 works for you,
I've got/done everything you menioned, with a few exceptions. I'll update Quicktime and Flashplayer. I may try the Safe Mode install a little later. There's no antivirus software on the system yet. Thanks for the suggestions!!