Elson
You might want to look into a sample playback module. Cheap. Tons of
sounds. Usually a huge synthesis engine that no one ever uses. Gives
you a wide set of sounds. A fuzzbox, an echo, and a wah wah will give
a little analog boost to the sound. Running the box through a tube
amp will help as well(run the bass through a massive old bass amp
with 15 inch speakers!).
I can recommend Vintage Keys. Cool sounds. I also like to use hand
percussion like rattles and bells, kids's squeak toys, melodicas,
harmonicas. For analog bass and drums, the Rebirth software rocks.
Collaborating with other musicians works great too.
Rainbow Jimmy
http://www.spaceanimals.comhttp://www.mp3.com/spaceanimals