1 yes, the easy composer makes patterns based on all the individual strands that make up the presets arranged in groups for you to mix and match into completely new pattern tracks. Just select a style and select or deselect a variation (Bass Drum/Snare cannot be deselected), and press SET to listen to the result. These can then be edited further in the composer when satisfied with the creation, eg to change voices etc etc.
2 Copy the custom to a composer using Custom Style Copy in the Composer menu, change the registration first 4 panel memories, copy the composer back to the custom. Likewise for a preset, copy to composer, copy the 4 MSAs into the first 4 panel memories of the same bank pointing to the composer pattern, change registration in the panel memories, copy to a custom slot.
details were here:
http://www.synthzone.com/ubbs/Forum25/HTML/002871.html/URL