IMO, the current wishlist/session list functionality isn't bad; it just needs a facelift via some addressed weaknesses. Importing an external list is lacking. I found it was easy to write a piece of code to import from another text based format (in my case from an ArgoNavis format used for visual work). IMO, the "big picture" concept for wishlist (as a general list), and session list (as a pre-scheduling list) are fine. The real issue seems to be no way to migrate item selections (especially multiple selections) from wishlist to session list and then to the scheduler. I see you've suggested yourself the idea of moving a selection from the new "targets tool" item to the scheduler. You're on a similar track as the previous suggestion(s).
My recommendation would be to take a look back at the prior post, and think about whether you are really that dissatisfied with the "big picture" of wishlist as a general list and session list as a pre-scheduling list. The "facelift" seems to be only some needed mouse action, a multi item "push-to-scheduler" interface for the scheduler, and a generic external list import feature. Icing on the cake would be to make the rise/set graphs consistent (see original post for details). cheers, Doug