For a little more advanced users I recommend VDMSound for JJ1 instead of DOSBox. First you have to patch FILE0001.exe with the Borland Pascal patch (TPPATCH.exe) and configure the sound of the game to Sound Blaster Pro. Now setup a VDMSound shortcut for the game with the right settings, run it, and you will play the game just as smooth on XP as you did on old plain DOS.