https://www.pakwheels.com/forums/car-audio-video-electronics/172939-fs-ip-bus-aux-lead-pioneer-head-units?highlight=pioneer
after seeing this thing..i got some idea in my mind....
1- pioneers pre hvng cd chngr control options can hot AUX input
2- these pre's can be programmed/optioned to display AUX as input.
3- chnger cbl can be used as AUX input cable.
so i set up the tools and finally m here 

this was the cbl and thn one cbl hvng aux jack attached with it n here it is

now i m enjoying my cell phone songs through my pioneer pre havng AUX INPUT NOW 
now this cable is also for sale coz i made 2

hope u wud lyk it.. ENJOY 