"Object-Oriented Reengineering Patterns" has some good advice on how to approach a legacy system and rewrite parts of it, pdf available from the authors website

"Object-Oriented Reengineering Patterns" has some good advice on how to approach a legacy system and rewrite parts of it, pdf available from the authors website: http://scg.unibe.ch/download/oorp/ http://scg.unibe.ch/download/oorp/