I know the TTDSmenu works as .nds file, I'm not sure whether it can autostart a game though.
Hope that helps.
(BTW, I assume your talking about renaming the .dat of the firmware?)
Also, great stuff on this!
Couldn't you put the covers on the bottom screen though?
And scroll through by touch screen (a'la iPod Touch).
BTW, I've a few design ideas if you're interested (I seem to be good with designing things like this) I don't take an offence if you don't use some (or even any) of the ideas, but I'm happy to send over a few quick pencil designs. (BTW, I mean I'll scan 'em & email 'em - just to be clear.)
I've got some pretty good ideas up to now if you're interested - I'm offering them to you as, well, I can't code or anything & you might benifit.
Perhaps even a partnership - I could give a few design ideas...well, sadly I guess you'd do most of the work, but most of the credit will be yours o' course.
Give me a quick PM/EMail if you're interested BTW!
I can send a few ideas, if you're not interested in any ideas/designs, you don't have to go any further with it either, & don't worry I wouldn't be offended either!