Well, you can use WordPad, that is sorta free. ;-) Actually, I do this a lot woth WordPad and/or Word. just make sure your replace line is unique enough. For example, when you have to convert your P4 MATs to ProPack MATs, replace ".bum" with ".jpg", but don't try replacing "bum", as it will replace BUMP MAP with JPGP MAP, Opps!