coopster - 2:15 pm on May 2, 2011 (gmt 0)
I use Eclipse, an open source IDE, and it is capable of finding and replacing using regular expressions within a file, a folder, or an entire project. A project can be a group of folders linked to folders in the file system. I would like to believe DW would have a similar feature set. If not, you should be able to use the command line to find and replace values as well. Perl is a great command line tool for getting this task accomplished.