Mad Catz Pro Guitar as a 4-String Bass

I'm going to give the disclaimer up front that I really don't know much about instruments and I could be completely wrong about this. That being said, I figured out how to get the Mad Catz Pro Guitar to be used as a 4-string bass (using the top 4 strings) by changing sound font and tuning. After hooking up the guitar via MIDI and turning it on, press triangle 5 times to change the sound font to Accoustic Bass (you can press it a few more times other styles of bass) and then box once to tune it down. If my understanding of tuning is accurate, this should set the strings from top to bottom as E1, A1, D2, G2.
Output Monitor from MIDI-OX