I don't believe there's a limit to sprites you can add for the different elements. You should be able to add additional upper arms, lower arms just like you do with hands, mouths, etc... Of course you'll have to add them in the Character COmposer, and not through importing a full character And you'd have to manually replace the sprite via the timeline, but it should be possible.
It still rather befuddles me that the things you want to do are all completely do-able in another 2D animation application, especially with PLE (point level editing)... CTA2's only real benefit is the re-usability of motions, but in every other area of 2D animation, it's just so stringent and limiting. But to each his own I suppose.
Edited
10 Years Ago by
wizaerd