Good man - you've done some effective digging! Like to see that!
You're spot on - it's the MRU XML files that you need to edit.
Now - that's a USER-specific file. So if you know who's going to use the console - you'd need to dump a copy into each of their profiles.
But other than that, you figured everything out correctly.
I just use a batch file that runs setup.exe /s CORE=CORENAME and it populates the core server name correctly.
Hey thanks! Sorry for the late reply!
I was able to get it working without issue!