Also, read this book: http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052 http://www.amazon.com/Working-Effectively-Legacy-Michael-F

Also, read this book: http://www.amazon.com/Working-Effectively-Legacy-Michael-Feathers/dp/0131177052 http://www.amazon.com/Working-Effectively-Legacy-Michael-Fea... It helps a lot and teaches you how to use grep and other tools (a lot more others that I no longer remember) to search and find your way through legacy code.