I don't think he wants to use RPC...
Go back a couple pages, if you grab my .rar file for C@VE beta 4, put those 2 files in the /payload/ folder, then just open your WiiU web browser and go to it like it says in my post. You need to be self hosting a web server to use it. I use Z-WAMP because there is no configuration (besides changing my port to 8080) and it's ready to go right away with no installation!
When you want to try a different .elf file, just replace the boot.elf with whatever you want to load up! (make sure it's still called boot.elf though!)