Most here play by forum using a dice roller and map utility.
If you're looking for a replacement for the old CD-ROM that offers real-time play try Triplea:http://sourceforge.net/project/showfiles.php?group_id=44492&package_id=119711&release_id=593647
You will need a current version of Java to run the game. One of the downloads includes the necessary java installer if you don't have the latest version. "Unstable" in the file name simply means there are new features in the download which are currently being testing before being released as "stable".
If you have any difficulty with it post back and I'll see if I can help you. ~ZP