Oh, I see! Though in fact I feel like it's kinda easier to animate bitmaps than it is to animate pixel art, if you simply use PSAI's layers as frames and have them in different transparency levels to check your animation ^-^
I've animated like that some times (after the animation was done i'd save each frame as a transparency png file, then open them up with Gale and assemble.)
For me that's always been the easiest less hard method of animating.
:^)
also
SLH <3 <3 <3 /O/ /O/ /O/