Search and Replace is great for this purpose, and very fast. I've used it for years. http://www.searchandreplace.com/search_replace.htm

>Anyone know of a way to do a simple search and replace in multiple documents? Specifically, I'm looking to search from a parent directory and subdirectories, find all documents that have a specific phrase, and automatically replace them with another phrase. Any utilities out there that can do this? I wouldn't mind if it could handle binary files as well as text-based, but I'll take what I can get.