JSplitPane divider component and JPopupMenu panel

Hello!

I have two questions:

1. Is it possible to use the JSplitPane's divider as a divider between
components with custom behavior (or doing nothing, not movable, or at
least only into one direction)?

2. Is it possible to restrict how far to move the divider left and
right?

3. JPopupMenu's use JMenuItem subclasses to add their items, how do I
make a JPopupMenu use a GridLayout panel with JButtons instead? It
very much looks like the ICQ/MSN smiley popup...

TIA
Karsten

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