Messing around wit EL,I came across a couple of small issues:
1 - I tried adding a PSP emulator (retroarch) and games. After adding the emulator parameters, PSP shows up in the create games list dialog and I can see that EmuLoader has correctly found the games DIR and successfully created a complete PSP.txt file in console_computer/games. However those games never show up in the main list. Also, PSP does not show up in the Machine Type and Systems filter. (For sanity, tried in EmuCon 2.7.7 and everything works there).
2 - This one may be a known issue, but the search games box (upper right corner of the main screen) only filters arcade titles and ignores console titles in the main list.