Go to omegadrivers.net and see if they have already prepped a version that will work for you. Keep in mind that using these sorts of drivers MAY have negative effects, like reduced battery life due to power management issues with your particular GPU.
Thanks for the help COLGeek. It appears the only nvidia driver available there is not compatible with win7. Hmm I'l keep checking but I guess I will just have to wait until Toshiba gets the ball rolling.