I just got a Raspberry Pie 3 and I'm trying to use berryboot to run raspbian, openelec and retropie 3.6. I'm having problems getting my PS3 controllers to work, some quick research shows that there was a bug in 3.6 that prevented the PS3 controllers from working. I've tried uninstalling and reinstalling the PS3 drivers but that didnt work. Anybody have any ideas?

Not sure...I'll look into it tonight. I just bought a Pie 3 also. My goal was PS4 controllers but I'm having issues with getting the BT to work on it as well.

I just got a second sd card and loaded retropie 3.8 and that fixed the Bluetooth problem

I just did this last week. Super easy.

1) Download the retropie image from here: https://retropie.org.uk/download/
2) Once you have it downloaded, follow the instructions here to install the image to your SD card: https://www.raspberrypi.org/documentation/installation/installing-images/README.md
3) Then follow this video to link the PS3 remote: