A little elaboration:

Only Jazz 2 versions 1.20 (retail) and greater can be played online (We either have 1.23 or 1.24, aka TSF or The Secret Files). The so-called OEM-versions (v. 1.00g is the most common one) are actually preview versions of the full game, they don't have online capabilities. Check the lower left corner of the main menu to see what version you have.

About the listserver patches, all you need to do is double-click it and it'll add the listserver addresses to the registry under the Jazz2 keys. Remember, it only works for version 1.20 or greater, since they write registry keys for online play, while the OEM versions don't (I think, someone enlighten me).

If you wanna get version 1.23 or 1.24, I'm afraid the upgrade patches only work with versions 1.20 to 1.22, the OEM-version has a different type of coding and are therefore incompatible with the current patches. Hunt down JJ2 On EBay, it's still illegal to download any of the full versions of the game.

- JelZe GoldRabbit =:3