I am currently working on the development of export and import routines my new My Image Here add-on. This idea was requested (first) by Georg Pichler to be able to create skins or themes for websites. You can easily select a set of replaced images in the options screen, and export them to a file, all settings including the actual images needed are stored in 1 file so you only have to publish/e-mail just that 1 file. Unfortunately compressing files does not appear to be possible in Firefox, so I have chosen to only encode the image file data in Base 64 and, add all data to the 1 export file, seems simple enough. The new update will also include some new icons created by efdur, he is the guy who initially asked me if I wanted to make My Image Here.