Did a quick test, set LCD as primary (1) and CRT as extended (2) in windows display properties and launched BigBox. The intro vid played on the LCD. Then checked BB > general > display settings and it shows Primary as 1 and Marquee as 2. Yet, The main menu of BB was on the CRT and the Marquee on the LCD. Why that is I am not sure, as I would expect in that setting the main display would be the LCD (1) for the test.
For now, I am setting this one aside as it is only 15 seconds at startup and then the real reason we are here begins, playing games.
Thanks everyone for your input, I appreciate it.