Oops!!! I see now that my post could be taken differently than I had intended. When I said "legit" license off Ebay, I was only saying to watch out for rip offs. Some people post offers on Ebay for software, and the buyer ends up getting a pirated copy or CD and Documents without the dongle (which is useless). Therefore, if you find you have the base package, you can probably pick up Extreme really cheap on Ebay, but try to be sure it is a "legit" copy you are buying.
Honestly, I never accuse anyone of using unlicensed software. It isn't my business, and is very insulting to those that do have legitamate licenses...which I never doubted you had.
As for your problem. You can load anything off the CD. So you might have Extreme on your desktop, but if your license is not for Extreme it won't run. What might be happening is the software is loading what it has licenses for and ignores the rest. Thus you might be starting Extreme but only the base modules are coming up. Look at your license file in the FlexLM directory. The 3rd line should look something like this "# PACKAGE: 3D Extreme 3.9.2". If it says this, then you probably do have Extreme.
Not sure what else to try. If you do not have maintanance, usually your reseller can be helpful, especially if you are only trying to get the software to run. Try the softimage web page forums. There is usually a lot of good info there.
Hope this helps. Again, sorry if you felt I was accusing you of anything.
Urp