Hey, I've had a scout around the forum, and tried using the search function, but couldn't find what I was looking for. My apologies if there is already a thread, if so could I be pointed in it's direction. I'm also sorry that these are very noob questions, of if the answer is staring me in the face. I have followed Adigitalmans very helpful tutorial on using DVD-Decrypt, Gordionknot, Womble etc for editing but had some additional questions;

Firstly, if I wanted to fo example add some explosions to a scene, say the two rockets fired at Obi-Wan in the opening of RotS how would I go about doing that? Next if I wanted to manually take out frames, and edit them in photo-shop, is that possible and how do you then place them back in the movie?

Lastly; with regards music tracks, is it possible to change music but keep existing effects in place? So for example if I wanted to change the standard droid tune to the Imperial March when Anakin sacks the Jedi Temple, how would I do that?

Thanks in advance for any help, and apologies if these questions have already been answered.