ok guys...Im confused now..

....i have both a dscustoms 5.6 screen and a DennisK touchscreen...I still dont know which one to use for my final install....
So when today and ripped out my stock headunit to figure out a way to connect the audio since i dont have an aux in and i dont like the way my irock transmitter sounds...just the like Audi guy(surfer)I want good quality sound....i was thinking about "splicing" into it...but then i changed my mind cuz i didnt see it.....
so then i was probably gonna get one of these:
http://www.rcainput.com/Merchant2/me...ory_Code=mitsu
so i dont have to "splice"

....and also i get to keep my 10 disc cd changer intact
so i removed my entire headunit and then measured my dennisK screen...here is how it looks which is not too bad...just need to touch it up on the final install...
http://www.mp3car.com/usersites/spyd...eninstall6.JPG
so im thinking of removing headunit and relocating it to my glove box using the adapter from rcainput.com to get my audio!
so then i started to put my headunit cuz i wasnt gonna install yet..not ill i get the Rca adapter....so when i plugged everything back in...my headunit read "CODE" at the begging and nothing would function....And then it reads "OFF"...what the heck is that??
Does anyone know why its doing that??My headunit is an Infinity that comes with all mitsu. eclipses and has a cd changer in the trunk...
Or should i just get a head unit with aux in?but i still want my cd changer to function though...
So please help me out here...im stuck and ive past my budget a long time ago....but im comitted on completing this project...no matter what it takes