For App-V 4 there used to be quite a nice tool called AC/DC from Login Consultants to load and debug packages. They did release a new version for App-V 5 too, but it suffers from general slowness which always annoyed me when having to test my sequenced packages.
So I simply made my own app and properly used multi-threading to make sure the UI always stays responsive even while the application is doing stuff. The end result was the “App-V Debugger and Loader” or short “ADeLe”.
You can watch a quick overview about what this tool can do here:
And download the app here: ADeLe 0.90