I just have a folder called DS Games, I put all the games I care about in it. Homebrew stuff goes in a Homebrew folder. Emulators are in a folder labeled for that particular emu. I rename all my files to a normal name for the game, I don't leave them in that cryptic naming scheme or with ROM numbers, unless required by an emu. As long as I don't have more the 127 ROMs in the folder (CycloDS), I'm good. I usually have about 100 at any given time. I like having the "pocket arcade", so I also load up my M3 Perfect slot2 with a bunch of GBA games and homebrew. Depending on my mood that day, I have hundreds of games to choose from to play at any given time. That's just the way I roll.
Just as you replying to mine is pointless seeing how everyone else ignored it (which is fine) it doesn't bother me....but i've seen it all latly,how many roms are on your card?,how do you list your roms?,what games do you play on the toliet?,what rom do you think will be number 3000,4000, etc etc,there just silly and pointless threads.....
/Giana Sisters Ds (this is the ds port of the c64 classic)
/LemmingsDs (this is the DS port of the Amiga classic)
/NDS (all my ds roms ..about 20 ..that are renamed to the no-intro convention)
/NES (nes emu and about 30 nes roms)