jas0nuk is back with the latest version of his ELF application for Pandora and DAX's Despertar Cementario v.3. For this build, he describes it as a minimal ELF Menu for Pandora. The changelog for v0.2 contains the following tweaks:

* Applications containing _SLIM or _FAT at the end of the filename (e.g. blah_SLIM.elf) will be greyed out if the menu is not running on that model.
o e.g. keyCleaner_FAT.elf will be greyed out and unselectable on a Slim PSP.
* Minor bug fixes

Now, the ELF MEnu v0.2 comes with very specific installation instructions, so it would certainly be your best choice to make sure and check out the Read Me. It's better to be safe than sorry, eh?