How do you convert this code from AS3 to AS2?

i'm sorry i've not seen partigen before and don't know enough about what you're trying to do to comment. So I'll pass on that one! (Others feel free to answer)

Thanks these tips should definitely get us the right track.
We know how to do this in simpler situations.

My only other question is would you recommend an AS2 compliant plugin like Partigen as a better approach to dealing with particles before AS3?

Thanks again!

Are you wanting someone to do the conversion for you, or are you asking for general tips for doing the conversion yourself?

i can give you tips:

have a look at the ActionScript 2.0 Migration page.

In this you'll find the property conversions eg(going from AS3 to AS2). y becomes _y, height becomes _height, scaleX becomes _xscale, void becomes Void etc.

you'll find that events need to be converted, eg.
particle.addEventListener(Event.ENTER_FRAME, animateParticle);
becomes:
particle.onEnterFrame=animateParticle;

the onEnterFrame class doesn't pass an Event parameter to the event listener. Instead, the event listener is automatically in the scope of the event dispatcher, so instead of 'event.target' you will be able to just target 'this'.

You'll need to use setInterval() instead of the Timer class.

You'll need to use attachMovie() instead of addChild().