Problems with .png
First of all I have to say that I am new to Max. I tried to work with some .png in Max and wanted to give them special coordinates. It workes. I have done it by fpic. But I don't know how I can have in one window more than one picture. These pictures should change their coordinates in different way.
If you're using [fpic], how are you using the window? You can of course use multiple fpics and set each to the correct position.
If you want to move (animate) pictures around, I would use a [jit.window] output instead of [fpic], that is really meant to display pictures as part of an interface.
Maybe you can post the patch you're working on, that would give a little bit more insight.