I've just skimmed through the first couple of pages, but didnt find anything about which lisp to use/howto. Any ideas?
In order to use this, you will need to install Racket first: http://racket-lang.org/
DrRacket is a great starting point if you don't want to bother with setting up Emacs and the SICP package even supports the image elements that are covered in the course.