Any suggestions how to update preprinted material?

For this and all the other variations on the theme in your other posts, one thing you could do is scan the material and then use an OCR editor to make changes.

Here's a link describing what OCR is in case you are not familiar with the term.

http://en.wikipedia.org/wiki/Optical_character_recognition

http://en.wikipedia.org/wiki/List_of_optical_character_recognition_software


There are also some web-based OCR services:

http://www.ocrgrid.org/online-ocr.html