I hate to burst your bubble, but if it's the full version you downloaded I'm afraid you've performed an illegal action. All full Jazz Jackrabbit games haven't been declared freeware yet, and never will be if we know Epic Games by heart, so it's still illegal to download any of the full games (downloading demos is still fine tho). Just because a game is old doesn't mean it's free, a company could still hold the right to sell it, look at what Nintendo and Sega are doing with their Mario and Sonic games. This applies to all games in general.

- JelZe GoldRabbit =:3