Auto-installing scripts/code like you did for Teahouse 

Hi WritKeeper!  I love what you did with the preloading auto-install Teahouse script.  I'm working on the WP:BADGE project and trying to do a similar thing but with inserting code onto a user's common.js file that customizes their WikiLove to include a list of Badges.  Any chance you could take a look at this thread? I've gotten the preload url to work, but I have no idea what to do with getting the actual code (or a template which transcludes the code) (or a userscript which imports the code) onto their common.js page.  If you can, awesome, if not thanks anyway!  t | c