For a new scenery creature what is the minimum animation sequences required by the game engine? Can the Walk Forward, Walk Left/Right, Idle & so forth all point to the same animation sequence?

I've got an animated butterfly that flutters around. Just need to add in the start/stop markers.

According to an old animation tutorial by AcidBasick you only need a walkforward and idle animation.
I can't confirm that though, I've never tried making a scenery creature before.

for a dummy creature, I actually only needed an idle animation.
but I think, it doesn't matter which animation remains, as long as it is at least one of them present.

I got it to work but the animation ends up very choppy with the flutter-by's skipping to random parts of the animation sequence. I'm guessing this because it only has an idle animation and that animation is 360 frames long.

here's the http://www.youtube.com/watch?v=xliMe1Gm_u8

can we have the files?