Page Categories?

With my old theme I had pages with sub pages such at Media Room. Under each page were only the sub pages that were relevant. But now I can't seem to figure out how to duplicate this. If I switch out the theme to test it I'll lose work in this theme. What I've tried so far:

Simple Tags with List Category Posts Plugin. It doesn't work.
Mesiak's Page Category. It doesn't work.
List Category Posts with names, tags, page IDs (which are actually post IDs).

The List Category plugin works fine for posts, but not for pages. And I do NOT want to go back and recreate all of my pages into posts. That would suck.

Solutions?