This is a Sx05RE release that runs as an add-on for CoreELEC, it does not include a Dreamcast nor a PSP emulator, everything else should be the same as Sx05RE
You will need at least 650MB of space in /storage to be able to install this add-on, and that does not include ROMS but If you want to use an external HDD or a USB for your ROMS, make a directory called "ROMS" in the root of the USB device, then inside create an empty file called sx05reroms, place your ROMS inside the corresponding folder (nes, snes, etc, etc.) then with the device plugged start the add-on.
You also need to put all of your BIOS files inside /storage/roms/bios/ (or if using the USB/HDD inside /roms/bios/)
Note: You need to enable external sources to be able to install this from zip, and at the moment it takes about 10-15 minutes to install, while its installing there will be no status update (not sure why) and it will look like Kodi is not doing anything but it is installing, be patient!
also, not all the options in the Emulationstation menu are working, they will be removed/fixed later