esetorica -
In addition to what's been said.. One simple way, of seeing how to create sounds on the IMS-20, or see what is possible... Is to browse SoundCloud for IMS-20 songs. You can do this from any browser - but if you do it from the iPad/IMS-20 itself, then you can download many of the songs you hear. This allows you to see how the sounds are patched, and how the songs are constructed. It is one of the best ways to get up to speed on IMS-20...
From the main window -- Under the SESSION section (top left), click the BROWSE button. This brings up a window with a boatload of options. What you want to select here, is under the Sharing section (bottom left), click SoundCloud. This will load up the screen with various songs you can listed to, and download into the IMS-20. Not all of them can be downloaded. I believe its only the ones with a paperclip in the second column which you can pull into the IMS-20.
Anyway - once you have a song selected with the paperclip

-- click the downward facing arrow, to download the song into your IMS-20. From there -- you can go back to the various sections of the IMS-20 and see how the artist developed the sounds, song, etc.. Quite a nice learning mechanism. When I was first fiddling around with the IMS-20, I would download songs/sessions, pull apart the various SOUND PRESETS that the artist had developed, and use those, to base my own library of presets on.
As a general comment -- I leave original sounds completely alone, don't rename them, and use them only as a learning tool. Point is -- someone else went through the trouble of generating the sounds... don't steal someone elses work. That said... some of the best sounds in my library, started off as another person's patch. If i tweak it enough to keep around.. i rename to JDOO-originalsoundname
Hope this helps / makes sense...