One thing I like about using Project Libraries is the ability to configure an Icon for the library that is overlaid on all of its new VIs. If you change this icon, you are asked, whether you want to apply this to all the VIs in the library. Unfortunately, once you have created the icon, there is no simple way to re-apply this icon to VIs and CTLs that you have added to the library. You can work around it using a few property and invoke nodes to programmatically call the proper method, but a simple button on the 'General' page of the library properties would make things a lot easier.