I use the "Update.bat" method and just reshack the default.dll and save all the bins to pngs,edit the pngs then use update.bat to update it back into the default.dll then package it all with themer... I do that everytime I want to preview so I know things will look good as you use the browser to test
Good luck!
MTUMA...You deserve Kudos, you have great Ideas! duh