Janky update:
Ok, I've got some time now and will go back to fill in on the process.
My all-in-one board works great. Having the J-Pac, HD, and Mini-ITX board all on one plate sure is handy. Clearances are a little tight, so if I ever fab a new one, I will make it a bit bigger and add just a little more space between the motherboard and the J-Pac*. But I screwed in on to the side of the cab, mounted the power supply on the floor of the cab, and fired it up.
I had to tweak the system a bit, as it was booting up to a blue screen when hooked to the ArcadeVGA. I figured out why, though - the board, while unused, had sat for a long time, and the cheap battery that holds the CMOS settings wasn't keeping them, so the board booted to the on-board video and not the ArcadeVGA. I replaced that battery with a new one for better results.
So once I got the boot issues sorted out, I went ahead a played with the OS setup and the front end. I used Instant Sheller to mask off the FE, made a custom boot screen for the PC, and have it autologin.

It comes up to my list of Vs Unisystem Games.

More later!
*Actually, I did JUST THAT right now as I typed this post.... gonna fab it in an hour.

**
** OK, fabbed it before I even finished this post. W00t!
