http://www.rjlsoftware.com/software/utility/search/Simple Search/Replace is like a replacement for the Windows "containing text" option found in their search window. It is extremely fast and allows for the option of replacing that text with different text. Simple Search/Replace was designed for searching plain-ASCII text files, such as source code, TXT, HTML, batch files or any other text file you might have.
Dl @ http://www.rjlsoftware.com/download/search.zip
Settings: Application folder
Tested: Portable
[Btw, I believe Simple Search-Replace was one of my first submission. It was recently updated, hence the new/proper post].