So you have a PS3 and Xbox 360, but only one Eagle Eye, huh? Well, now you can use your Eagle Eye on either system! How, you ask? Well...
Step 1: To start, you need to download the firmware for the system you want to switch to
If you have a PS3 Eagle Eye, and you want to change it into a Xbox 360 Eagle Eye: http://www.penguinunited.com/download/XBOXOPEN.bin
If you have a Xbox 360 Eagle Eye, and you want to change it into a PS3 Eagle Eye: http://www.penguinunited.com/download/PS3OPEN.bin
Step 2: After downloading the file, place it into same folder that you have Eagle Edit. When installing the file, you're going to have to use the same version of Eagle Edit that your Eagle Eye is currently installed to run. So, if you have PS3 firmware installed on it (and you do if are doing this for the first time and bought a PS3 Eagle Eye) then the firmware needs to be saved to the same folder as the PS3 version of Eagle Edit.
Step 3: Now, open up Eagle Edit (the one currently installed on the Eagle Eye) and plug in your Eagle Eye with the switch on the bottom set to PLAY.
Step 4: At the top of the screen, you will see a small button labeled BIN. Press this button and select the .bin file you put in the Eagle Edit folder
Step 5: Wait...
Step 6: After the program displays a window saying "Done," the installation is complete. Close Eagle Edit and open the version of Eagle Edit that the Eagle Eye is currently set to (So, if it is a PS3 Eagle Eye that you've just turned into an Xbox Eagle Eye, you need to open up Xbox Eagle Edit and keymap with that). After that, do everything as you would normally! If you want to switch back, do the entire process again, and just make sure that you use the version of Eagle Edit that is currently installed on the Eagle Eye.