flash actionscript: I am an intermediate flash developer trying to understand this dynamic app. But
I am having some interactions problems. I could really use some help. I have
some buttons on my stage. I would like to have them load a clip onto the stage,
but first remove the previous viewing clip before loading the new clip. Can
someone help me with this please? I know it involves some action scripting. I
am not sure which needs the action script though.

just use loadMovie() or loadClip() (if you're using the moviecliploader class)
and load into the same target movieclip. the previously loaded clip will be
unloaded as the new external file begins to load.

OK. I understand that way.

But another thing is that the movie clips that I am using have animations to
them. Like they move onto the screen from off the stage. And when I would like
them to leave. I wanted them to "zoom" and "fade out".

if you want to display a transition from one swf to the next you'll need, at
least, two target movieclips. one to contain the current swf and the other to
contain the next swf that's to be displayed.

the next swf should be loaded into a target that has _alpha=0. when loading
is complete you'll start the transition of the currently loaded swf (to "zoom"
and "fade out"). sometime prior to or when that zoom and fade are complete
you'll start the transition for the next swf to display.

the next swf to display will load into the previously zoomed and faded-out
target movieclip.

you'll need two target movieclips. you can use actionscript to create them
both.

you'll load your first and every odd load into one of the target movieclips
and every even load you'll load into the other target movieclip.

that way you'll have both the current and next swf loaded at the same time and
can execute your transition for one to the other.