What is your opinion on the expansions?

P.S. It works on any version, even on a pirated copy.

It only works on version 3.0 of the game!
How to check: For those with Windows XP, go to the game folder and hover the cursor over the .exe file. The information will be displayed.
For those who don't have XP, right-click on the .exe file, go to the "Application" tab, and select the "Version" submenu in this tab.