Headlights Setup

[Meanie]

Hey guys, I've got an oldass Audi A4 B6.

The front headlights are yellow and scratched like hell so I've bought some new plastic headlights, no internals.

 

My plan is to remove the current ones from the car, remove the internals (bulbs and everything else) and put those on the new headlights before I reinstall those on the car.

 

So, how difficult the internal parts swapping can be? What special care should I have? Not touch the glass of the bulbs? Use some kind of gloves?

Does the xenon HID thingie hold electrical charge or something? Does the bulbs motors?

 

Basically I want to know how likely am I to drop dead from messing about with the internals of an unconnected headlight and how hard it is to do so.

 

Thanks! :)

Ahh, I've got these to help me out: