look for a prog caled ultramon
http://www.realtimesoft.com/ultramon/
this program is awesome. this s directly from the site.
UltraMon is a utility for multi-monitor systems, designed to increase productivity and unlock the full potential of multiple monitors.
efficiently move windows and maximize windows across the desktop
manage more applications with the Smart Taskbar
control application positioning with UltraMon Shortcuts
multi-monitor support for desktop wallpapers and screen savers
mirror your main monitor to secondary monitors for a presentation]
i think it has a free tour. i personaly think its worth the money but i use dual alot.