Quoted from Apinjunkie:
You're right, in that it is just as simple as adding your own numbers to the front of your files. Keep in mind although you can load more than 50 videos on the card, it won't recognize or play more than 50 videos. If you have 51 loaded on there it wont play any.
OK...thanks a lot.
My friend mentioned something about being told there was a file limit. I wasn't sure if it was a limited number of files or a limit on the files sizes. I also wasn't sure if being over that limit would cause the files not to play at all or if it would just cut off the number above that.
The included memory card had a lot of room on it. So from what I am expecting you could keep the (up to 50) .bin files you want it to play on the root of the memory card and have others in folders on the memory card for easy switching by putting the memory card in a PC and dragging the .bin files from place to place.
My friend got the wall mount option because his ceiling was not tall enough, but he seems to only want the Star Wars clips on it (though he has most of the top Bally / Williams games in his collection). Maybe after some time of seeing the Star Wars clips he will decide to mix it up and if he puts a nice mix on the memory card, it should be pretty easy to mix it up from time to time.
Thanks again for the info Apinjunkie