I don't know if you are still looking for additions to your guest wireless system but I have put together some simple PHP code that helps automate the guest user creation. Find the code here: https://sourceforge.net/projects/simple-swag/ The original intention of the code was a simple way for administrators to provide simple Lobby Ambassidor like function to a simple web interface and then provide customized guest user instruction page. In the background it uses ssh to talk to the controller and setup the account. Its written in PHP so feel free to try your hand at it.
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin