Processing PDFs as images

Hi,

is there any way to load in a PDF or ms word document as an image. So each page is shown as a separate image.

This is something I want to do in order get the images as well as text present. The purpose of this is to process a batch of documents and alter the image on each, I.e. to cover up confidential content and then to save back out as PDF or JPEG etc.

any ideas

simon.