I'd just like to say that my "Super Fun Happy Joy Joy Power Player III" or whatever the heck they call it has those exact same hacks on it, InsaneDavid. The only difference is that it has what's supposed to be Woody from Toy Story hacked into Bomberman instead of Nuts & Milk. The title screen is almost the same except it's a different X in 1 and it has difference pictures at the title screen. What I mean to say is that mine has 6 pictures in the same arrangement as yours and it has "whatever-in-one" in big red text in the same font. It also has a white background at startup, too.
I'm not trying to hijack this thread, but I have two Power Player systems. One has those romhacks on it and the other one has just NES games. Has anyone tried to document all of the Power Player revisions?