Creating an animation of a snowball being thrown

I know how to accomplish the type of animation I want (using a motion guide works well enough) but Im having trouble incorporating the animation into my game.

I want to have the animation play as if the player (in first person) throws a snowball everytime they hit the spacebar. I know how to add that interactivity but the problem becomes how to add the interactivty and have the animation move the “snowball” in an arc on the stage and have it get smaller as it goes off into the distance.

The easiest way for me to get the collisions to work (you are throwing snowballs at moving targets) is to have the snowball be a movieclip on it own and use the Tween class to move it around the stage. The problem with that approach is that Tween doesnt really allow you to move the snowball in an arc fashion (like a projectile). Or at least not in a way that I have been able to figure out.

The other approach is to create the animation using a motion guide or frame-by-frame animation but then the action of throwing the snowball has to be an entire movieclip in and of itself. The result being is that I cant simply test to see if the throwing snowball clip collides with any of the targets (as the movie clip with take up a larger area to encapsulate the throw and therefore be more likely to collide with targets regardless of what area the actual snowball is in within the movieclip).

So I’m having trouble bridging the gap between the animation I’m after and having it work in the game environment.

Can anybody shed some light on this for me?

Cheers.