Items needed install touchscreen

[adamw89_2000]

I have an 05 sut with the stock 6 disk changer. The display has stopped working on it and I'm looking to install a touchscreen with navigation now... What all things will I need to make a unitk work and keep all my chimes and what not. Our local install shop said they won't even install a unit in my truck even if I buy it from them! What kinda crap is that.... They said they are to hard to install and have to many additional features to get it working properly.... I know it's just the matter of a couple right connectors... Any help on what I need? Also I hav headrest monitors in seTs. I'm pretty sure they r not factory... Can I hook up the touchscreen to play the DVD or video back on them as well? Thanks