Installing an aftermarket dvd gps stereo

[RICHIEUSA]

i don't want to lose the bose stereo system (10 speakers ) from my mazda 6 2009 grand touriong but i want to replace the audio unit for an aftermarket dvd Gps stereo.
Somebody can help me step by step how i can install a new stereo using the FACTORY BOSE amplifier and all speakers can work normal, i know is posible.
All pics ,manuals, diagrams, sugestions or videos are well acepted, please help me.

thanks.

 

[RICHIEUSA]

please somebody help me if i need an aditional connector or something.

 

[JoeyBoomBoom]

http://www.mazdas247.com/forum/showthread.php?t=123742751

http://www.mazda6forums.co.uk/forum/index.php?topic=220.msg650