Search & Replace is a wonderful tool that lets you basically search for bits of text/code & replace it with other bits of text - so if a sponsor has you change a link code, you can tell the program to search for the one link & replace it with the other.
TexPad has this built into it, but it's only for one line of code (which will work for what you want to do)
Most HTML editors also have it build in (it might be called "find & replace")
If you wanted to search for multiple lines - like if you had coding for a banner on a page & it was 3 lines long, you can use
http://www.funduc.com/search_replace.htm for it
