I've done it. All you do is go to finder, then click on Go up in the top, select go to folder, and put this address:
(Computer user name)/(wherever the blender folder is)/blender-2.49.2-darwin-7.9.0-powerepc-py2.3(or whatever the folder's name is)/Blender.app/Contents/MacOS/.blender/Scripts/
It may be a little different for you, but that is what mine was. When you open the folder, you drag most of the contents of the .DTS exporter folder into the /Scripts/ folder. It will say something about replacing, just replace with the newer files. It should work after that. Hope I helped.