I have something similar at Gtk2 Visual Grep which I use for pasting code into Perlmonk's nodes. Just run "vgrep n searchword" to search a directory for files with that searchword in it's filename, then click on the result links to open them. Then it's a simple matter of right-click->select-all followed by right-click->copy then a copy operation into the Perlmonk's editor box.

Maybe you could combine the 2 scripts, to have 2 modes, search for keywords, or write new.