Software Deployment

Has anyone had any success with deploying Windows Updates automatically using SMS and WUInstall? Every time I deploy and run the program, the SMS client returns with a failure exit code even though it does correctly install the updates. The client then (sometimes) retries the program and downloads more updates, until there are no more updates, and then it returns as successful. Depending on the advertisement settings and app switches used, it sometimes gets into a reboot loop.

I am trying to get it to return a successful exit code after the first set of updates, so that I can reboot the machine via SMS.

Any ideas? Thanks in advance!