Hi -
Here is a list of the API commands that you may find useful. The start maintenance & end maintenacne maybe what you are looking for. [External API][1]
Another option would be to install just the console on your local desktop and use it to connect the main service to be able to put servers into and out of maintenance. [Remote and Distributed Server Monitoring][2]
Thanks<br />Quinn
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[1]: http://www.poweradmin.com/help/sm_5_1/config_api.aspx
[2]: http://www.poweradmin.com/help/sm_5_1/config_remote_monitoring.aspx