probably need to familiarize yourself with the basics of shake, first.
you can actually avoid the GUI completely for tasks like this, with shake.
using the terminal, you can navigate to the folder containing your Quicktime mov and type
shake -info nameOfMovie.mov
this will return some info, including the frame range.
Then, you can type
shake nameOfMovie.mov -fo nameOfSeq.@@@.tif -t 1-100
where @@@ is the number of 0's you want in your numbering and -t is the frame range.
usually, I make a folder for the image seq to reside in
Depends on what you want to do to the images in PS, shake pretty much can do everything PS can do, except the healing brush
To work on images inside shake you'll need to do a couple of tutorials first to get used to the concept of a node based workflow.
basically you'd bring your .mov in with a fileIn and then connect a series of nodes under it, the last being a fileOut node.
Good luck. It's definitely worth learning the shake process. I just taught one of my clients, a photographer, to use it. He's hooked.