upgrading casette player to mp3 plyr but?

hello guys

i have an intresting topic that i could only share in here!   

 ok guys this is the picture of my casette player (pioneer  KEH-P1010R)

and i have a MP3,WMA player

i want to open inside of this tape, make some soldering and upgrade it into mp3 player...

BUT HOW??

some people advised me to use casette aux cable but its making noise since its working just like a casette

let me tell you my opinion about doing this job,

this tape has cd changer input but its only produced for cd players...

maybe i can trick the tape and show my mp3 player as  if its a cd changer...???

thank you for reading...

I can't begin to understand what you're describing here.  Can you be more specific?  And pic isn't coming up, but that may be my system problem.

meanwhile check with Pioneer for an aux input adapter for your changer input.

ok let me explain in detail

this casette player has amplifier pre out , (that goes to a sub amplifier)  and 4*45 output

i have a MP3 player

When i play a casette it gives bad sound,

when i play casette that has a cable for  connecting  MP3 player it gives bad sound

when i plug MP3 player to amplifier directly it gives bad sound and i can only use it for sub...

so if i can find a way to enter the system of this tape,

i will directly connect the mp3 player so  i will get better sound...