You throw all the pics in the downloaded images, then edit the xml file located in room folder and manually add each game's picture location. It's not super convenient, but you'll be able to dump all your pictures for one system.

Hello,
I wanted to see how high of a resolution my pi could handle for n64 games. I went into Mario Kart 64, and through the quick menu settings of libretro I turned it up very high. While I expected a incredibly slow framerate, it now completely crashes on bootup. How can I lower the resolution of the game without being able to open it?

Here's how I got my Mario Party 3 to work:

Put in a zip file. Unfortunately, recalbox does not liked zipped files in N64 titles for some reason. You'll have to manually put the file into your pi in the roms/n64 folder.
Next, go into the xml file that's in your n64 folder. Change the directory of the path for your Mario Party 3 file (for example, if it was Mario Party 3.z64, make it Mario Party 3.zip). It still won't pop up on your manager, but now the zipped file will show on your pi.
Now, go into the emulation settings on your pi for the Mario Party 3 settings. Select the retroarch/libretro option, and don't leave the core on default (even if there's only one option for libertro, for some reason it will not run on default)

That should work. Retroarch plays Mario Party 3 at a much lower resolution, which makes it stable enough to play. Increasing the resolution will cause issues, including the characters popping back out of place. This method works for most roms that aren't normally supported. Hope this helps!

Hello,
I am trying to emulate "Namco Classics Collection Vol. 2" in MAME. I have been struggling because I cannot get either advanceMAME or Retroarch to work properly. Retroarch will have no sound, and trying to select any game in the menu will cause it to black screen. I had taken every bios recommended by the wiki and added to the folder, but it had no effect. advanceMAME will run perfectly, but will not save any settings or high scores. Every time I boot up the rom, it will check the ram before displaying [EEP CLEAR]. Even if I get something like free play to work in the switches, it will just reset after I quit. Is there any way to fix the emulation issues in Retroarch or get my settings to save in advanceMAME?