Theme Creator: R4
Nothing beats the nostalgia of the Nintendo DS, but the stock menus can get a bit stale. I spent the afternoon playing around with the R4 Theme Creator to make this [Theme Name, e.g., Cyberpunk / Retro RPG] look.
Give your theme a unique name and drop your custom files inside. Switch it on: Pop the SD card back into your DS, go to your menu, and select your new skin. r4 theme creator
(If you want, I can produce a ready-to-use set of image dimension specs and a sample theme.ini tuned for a common R4 firmware.) Nothing beats the nostalgia of the Nintendo DS,
Example: