Guide to getting mp3 and video working

[Subs]

Hi there,

Just installed Kubuntu. From looking at the FAQ on the website I thought it 
would be easy to get video or at least mp3 support working by installing a 
couple of packages. Alas no it's not. No doubt this has been asked a million 
times before but for Kubuntu 6.10 what do I need to do to 

* Get mp3 support in Amarok and in general across the desktop?
* What do I need to do in order to play back the avi's I taken with my camera 
on my holidays?
* What do we I need to do to be able to playback the DVDs I rent from the 
video store?

I'd be happy to produce a guide and stick it up on the Kubuntu FAQ if someone 
could tell me how to do these things. Is it not time that a quick link was 
provided on the desktop which would install all these dependancies at the 
click of a user button?

Other than that thanks to everyone who's put the effort into producing this 
great kde-based Ubuntu!

Cheers,
subs