Local User On Whs 2011

Hi, been using WHS 2011 for a few months now as a home media streamer. Using the ebooks available here I've successfully got SABnzbd setup and a Calibre library with a COPS feed for my ereaders. I've centralised my MySQL server for XBMC and Argus TV

I'm not sure if it's possible to achieve what I'd like to do next so I'd like your opinions.

I'd like to run XBMC on my server so I can automatically update my library rather than using clients, primarily so my library is always up to date and my fiancée doesn't have to do anything.

It would appear that it's not possible to run XBMC as a service using task manager although it can be run if I login as Administrator and although I don't actually use it to watch anything I can use it to manage the library etc.

Now I know that leaving Administrator logged in isn't advisable for security reasons so what I would like to do is create a local non-admin account to run XBMC on. I know this isn't possible through the dashboard although using control panel I am able to create a user that's not an administrator but am unable to login to this account.

I wondered if anyone can help.

Thanks