HALP!
I have a gaming laptop: the Dell M11X. It uses 2 video cards: the integrated Intel card for regular, every day stuff, and an NVidia 335M for graphics intensive stuff (ie. gaming).
The NVidia control panel will often detect and automatically make my laptop use the NVidia card whenever I launch a game, but not always. Sometimes I need to manually tell the my rig to use the NVidia card for a certain program. To do this, I simply select the .exe that I wish to use the beefy graphics card in the NVidia Control Panel and I'm off to the races.