Best Buy installation question

I just got this system Alpine IVA-C800.  It is the indash cd version with 6.5" Screen.  First can i add any DVD changer to this sytem or there are specific brands?  Also if i took this to best buy to install it, I heard that they will put that safety feature which will not allow the video to play when vehicle is moving.  Are they require by law to do that or can i just tell em not to enable this thing.  Also if i wanted to add a navigation system later to the system will it then allow me to view video or navigation map while vehical is moving.  Please let me know.

thanks

2000 Ford F150XLT..

Yes larger retail chains such as best buy will not bypass the emergency brake safety. My advice would be to go to a smaller local shop and most likely they will by pass it. However I would make it clear in the beginning that you want to disable the feature before they start your install if.

So how exactly do you bypass the safety feature? Do you just ground both wires?

sure thing, just find anybody with a screwdriver and ask them to do it... then when something goes wrong, just go back to him and ask him to fix/replace it...

the only advantage to getting an install done professionally is the fact that every major shop gives you a lifetime warranty on the install. if billy bob down the street breaks your dash getting the deck in, you're gonna eat that one yourself... shops have insurance (not to mention more experience) that deals with that type of stuff.

but as for the safety system in the alpine deck, there is a relay pack made that defeats the two safety wires... how do you think they get working models in stores? the display units are exactly the same as the ones you buy. you just have to hunt down the piece... and just for the record, alpine's one of the only companies that requires this piece. most makes like kenwood, pioneer, and sony simply require the safety wire to be grounded.