Thanks for the suggestion. To begin with, it was a really rubbish suggestion, with rather more than 'a little flicker' going on, but...
You definitely got me thinking, and after I had done that for a while, I reached for AutoHotKey... and now have something workable.
It's still not perfect, so am still keen to hear any other ideas.
What's not perfect?
There's the merest flash of the taskbar as it drops in and out of standard view. It really is just a flash, but as it's visible, it's not a perfect solution for me.
The script below gets me from anywhere in theater view to my Movies. It takes one second and for a fraction of that, there's a taskbar flash. The navigation commands are in so fast, I don't see the home page at all. The screen goes black for a second and there's the movie list. Brilliant.
Run mc20.exe /Mode Standard
Sleep 100
Run mc20.exe /MCC 22001,0
Sleep 900
Sendinput {Right 3}
Sendinput {Down}
Sendinput {Right 2}
Sendinput {Enter}
I made others for Audio and Photos too that work just as well, and also, for when I'm drilled into a file, I now have single buttons for "Back, Left, Enter", "Back, Down, Enter" and "Back, Up, Enter" that happen so fast, the next/previous file is there instantaneously. This is also brilliant.
Those 'next/previous' file ones will work anywhere. If anyone wants to try them, just shout and I'll post them. They're just little 1Mb exe files.
Also, thanks JeTie, for getting me rolling towards a workable solution, it was appreciated. I just need to give that taskbar some thought now... I wonder if hiding it might work...
-marko