Looking at ordering one of these soon NEW! Plug&Play AV multimedia interface - RNS-E TV DVD - AUDI A3 A4 A6 | eBay

Has anyone got anything similar? I'm looking to use it with a reverse camera similar to this one here
Rear Reversing colour Camera + plate light for Audi A4, A5, TT, Q5 | eBay

Will I need to do a vim hack or VCDS programming to make this possible and also would it effect any of my current rnse functions such as nav etc and how hard a job is it to wire the lot in.

Thanks in advance