Darken / enhance images in document for better printing

I have a document of about 90 pages. 30 of which are scans of hand written petty cash records which are hard to read because they were written in ink and the ink is light. I want to darken the writing keeping the background white. On each page there are one or 2 areaa I have highlighted (boxed) I want the highlighted areas to be made into a page(s) inserted after the image (and indexed per the source page e.g. CHEQUE 6/37) and the area(s) cropped and enlarged on the new page for better reading and printing. I then have the 37 images that I want made into 1 darkened for print and viewing file and saved as a single pdf file. Finally I have 60 xl sheets which I want made into a single(page numbered) pdf file and each page headed with the file name. ## Deliverables * * *This broadcast message was sent to all bidders on Monday Feb 21, 2011 3:25:43 PM: At the request of most bidders I have uploaded one of the pages to be enhanced for printing. Also please select an area of the page and copy it to a new page and make larger. Please sned me back the bsest results you can make of this. I will then award the project after printing.