Appropriately, it's a book: http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052 http://www.amazon.com/Working-Effectively-Legacy-Mic

Appropriately, it's a book: http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052 http://www.amazon.com/Working-Effectively-Legacy-Michael-Fea... Some automatic tools could help (although I doubt thay'll work on DBase III): Static analysis to see what's there, version control to start at the top and log your way through and be able to rollback to a previous working version. But it's at the very least weeks of pain.