I have just released a new untility I have made for doom 3. It allows you to select the doom 3 folder, then perform a search for files within any of the *.pk4 files in the Doom3 folder. (or any folder for that matter). There are hundreads if not thousands of files that make up the doom3 game and this utility is very usefull for searching for tracking down cirtian file(s) you are interested in. As far as I know the Doom3 editor does not provide this functionality.
This utility may become one of a number of tool I may make for Doom3.
CBXDoom3Tools.zip <link to file missing>