mylink system for the HD's

[cat320]

I had a few questions for the 2015 hd mylink system. .

 

i have one that will just have the 8" but no nav can that be put in after and do you have to replace anything or is it more computer related work to do it?

 

Will any phone with blue tooth work with it ?

 

can you play movies on them or show pics while parked with a regular cab ? becuase it has the usb port not sure if the cd opening would suport a dvd or will it ?

 

also i have read about weather on them too how would you get that option ?