Now that I have the marquee done, I would like get started on the side art. However, I am not sure exactly how to go about this. Here is the side art I am trying to vectorize:

My questions:
1) How exactly was the side art originally applied? To me, it looks like there are 2 seperate sheets b/c of a seam in the middle.
2) Should I just vectorize the characters or should I do everything? There are a lot of parts that are detached from the characters like "The Simpsons," Konami, and those wavy lines that make the side art span a huge area.
3) How practical is vectorizing this? If I vectorize the entire thing is it feasible to print or would the cost b/c of the large size be overwhelming?
4) What dimensions do you normally use inside the illustrator file? For the marquee, I kept the illustrator file at the same dimensions as the actual marquee, but I think that would not work for this large sideart.
Thanks!