>I find myself using the Code References tool more and more, because previous searches are persistant across sessions. However, I'd like to open it up to the previous results window directly, rather than having to run a new search every time it starts. I didn't see it with a casual look through XSource - is it in there, and what would I have to change? Or do I need to submit this as an enhancement request?

Try

DO (HOME() + "foxref.app")