Not that anyone's really amazed by tweedle sprites anymore, but here's the minimalist guide to viewing tweedle if you're not into hex editors / memory editors / sprite dynamites. But you'll still need regedit though.

1. Create an empty level in JCS, except maybe a background and a floor with Jazz Start on top of it. Place 5 ambient sounds, left to right, with sample numbers 14, 27, 43, 46 and 100 anywhere in the level.
2. Save the level as tweedle.j2l
3. Open regedit and go to HKEY_CURRENT_USER\Software\Epic MegaGames\Jazz Jackrabbit 2\1.23\Player0
4. Set the value of Char to "5C 00 00 00"
5. Run JJ2 with the command line "jazz2 -server tweedle.j2l"