If you want to make your own custom sounds (and you want to) get the Beatnik editor for free (or buy the PRO version which support .mp3 samples, but at the moment this system does not support mp3 compressed soundbanks simply because java 1.3 doesn't support it) from Beatnik. This program only runs on MACs *buuuuuuu!* *BUUUUU!*. Now, also find the RMFX tutorial on the Beatnik page and follow it. The resulting rmf file if you followed the tutorial correctly can be used and loaded by the pl0t system.