Some refactoring, partially to accommodate changes suggested by douggreen. The basic context-loading problem has not yet been solved, however.

Save routines should now pretty much be functional. The problems appear to now pretty much be limited to context loading/generation at render time. It's not clear if the problem is with panels_page logic, the Panels engine, or some squirrely D6 changes.

Incremental commit - added a few missing inc loaders; also added the import page form. Next - fixing all the submit functions! yay...

Incremental commit; refactored most of the admin callbacks to be (partially) compliant with FAPI, and to deal with the new logic-at-the-loader-level approach.

I'm probably going to write a single FAPI pass-thru for all or most of the individual admin form page callbacks. Eventually.

Incremental commit; docblock tweaks, and minor refactor of one validator (which has been backported, minus string changes).

Rolled back earlier changes to admin path schema - $panel_page->name now precedes the action verb (e.g. edit, export) again.

Moved the admin wildcard loader out into the main panels_page.module file (where it should have been in the first place), and rejiggered the paths to match up with the new editing paths (action verb before $panel_page->name). The new paths may be rolled back.

Panels Page now installs successfully, although the schema is likely going to change. The essential infrastructure for the menu system is functioning correctly. The secondary router storage mechanism, page callbacks, temporary panel data storage mechanism (for render callbacks) and a few other things need to be designed - but we're on the home stretch.

About three-quarters of the way through the menu system port. Most of the guts are in place, although the bitmasks need considerable work and I've yet to work out a finite solution for sticking the admin tabs in wherever they might need to be.

Initial D6 work -- this includes only panels.module stuff. Right now the drag & drop display editor works, layout, layout settings and render works. Special features such as cache and styles may or may not work.