Ah, so you're not limited to those two XML URLs only, that kinda threw me off
.
You should know the next Plus! version will have built in auto-update for scripts and skins. Developers can still disable Plus' auto-update and use their own system if they wish, but by default Plus! will be able to preform auto-update on almost every skin and script in the download DB. Not that you shouldn't continue to create this, but i wanted to be sure you know about it.
/ 
