Attaching movie clips with apparent delay

I’ve been trying to figger this one out. How do you create a delay effect when dynamically attaching mc’s to another mc, the stage, whatever.

say you’re building an xml driven menu which is essentially a stack of mc’s attached to another. how do you make them appear to fade in one by one, starting at the top and working toward the bottom? (i can create the effect, just not sure how to script it).

it’s gotta be fairly straightforward since i see it lots of places. I tried creating it with frames but that doesn’t work since the mc’s get attached so quickly.

any help is great! we should have a tutorial on this!

thanks!