you can install the IR's on the SD card that comes with the EPSI. plug the SD card into your pc and then just drag and drop whatever IR's you want to use. put the SD card back in the EPSI and it works.
note: you must make sure that the name of the IR starts with a 3 digit number like 001, 002, 003, etc. the Epsi only displays the number, not the file name.