I have a few questions about what would be the best way to proceed with a catalog I share with another writer and as a songwriter in general. If anybody knows a lot about this stuff, or thinks they have any good ideas, I would be very grateful.

Here is a quick summary of my current situation:
I was in a pop/rock band with another song writer. We independently funded a professional quality record that we wrote and performed ourselves. However, within a month or two of completing tracking, the band broke up which put the songs in an odd state of limbo. Now that the band is non-existent, we need to explore new options for having these songs advance our careers as song writers independent of that band.

We registered a publishing company through ASCAP when the band was active and one of the members still feels like it would be our best option to exclusively seek performances of the recordings through our company. However, especially since the band will not be promoting the material, it seems to me that exclusively using our company to publish the songs would be a dead-end street. That brings about my first question:
-Is there a way that we could sign these songs to a publisher and still have rights to find outlets through our company as well? This would allow us to individually push the material (which would allow us to keep our publishing income for deals that we found) as well as have a legitimate publishing company find connections for the songs (of course, we'd be giving up the 50% for these deals). If I understand correctly, it seems like the only way to do this is have a "non-exclusive" publishing deal with both companies. If this is the case, couldn't we potentially have the songs in "non-exclusive" deals with multiple companies?

Currently, the other writer of that band and I are starting a small recording studio in order to advance our catalog of professional quality recordings of our original compositions (for demos as well as masters). Instead of using our band as the only promoter of our material, we are trying to get into TV, film scoring, commercials, etc (essentially, we will write for anyone who wants to commission our talents). My second question then, is:
-Is there any specific or general type of publishing company that I should look at for this catalog that would be more likely to get us into those fields in the future if they did like this work?
Thanks ahead of time for any advice I can get.