Danke schön, kameraden!

I will try Herr-Berbunch's suggestions.
A few questions:
1. If I have StarForce (I assume I do since I have an old DVD), why doesn't the removal tool detect anything? Will running the registry cleaner fix something that will allow the StarForce removal tool to work correctly?
2. Does my error message suggest that this is a StarForce problem? ("Protection System: Error: This application can be launched with a release version of Miscrosoft [sic] Windows 95 OSR2.1/ME/NT 4.0/2000/XP/ Server 2003 only.")
3. Lastly, every time I have installed so far, I have left the box "Windows Media 9 Codecs" unchecked. Should I install these, and would this have anything to do with the error message I'm receiving? If I do install them, will that screw up all my more modern games? If so, can I just reinstall a newer driver to counteract the ones from the SHIII installation?
Danke!