I just got a new SD card and put the PiPlay on it. It is awesome! I am wondering, how do I add new emulators? I see the icons for the other emulators on the menu, but they are grayed out (MAME4all, NES, etc). I thought that I had seen a link earlier to instructions on how to install MAME emulators, since MAME license doesn't allow it to be sold with the pre-installed SD cards.

I didn't know there were issues with NES/etc. emulators as far as licensing, is there something else I am missing? I am really looking forward to testing out my newly re-purposed Raspberry Pi :)