Timed switch between 2 psus
Ok, so after a little searching I found what I wanted. I took two circuits and carefully fused (read:mashed) them together, simulated them and got a working solution. Basically I found a circuit to delay the turning off 12V-B relay and turning on the Batter Pack relay for a set amount of time.

This circuit will also allow the 12V-B relay to turn back on if the 12V-A relay is activated again. So, I have not only answered my original question, but the extra portion as well.

Note: I just realized that you can't read C2 (2.2uF) and D3 (1N4148).
Note 2:R6, R8, and C3 control the length of time the Batter Pack is on &amp; C1 and R2 control the time delay for the U4 relay turn off. Where the voltage pins are, those are the outputs, I haven't figured out all the nuances of Cadence yet.





Combined Response, both voltage outputs were paralled before ground


Picture quality may be crud, however I can provide better pics if someone wants them.

Delay came from Generate DC pulse after switch turned off?