ubun2

I just installed ubuntu 10.10  desktop on a toshiba satelite running xp pro.  After instalation it shows a small screen with a resolution of 800 x 600.  I have an nvidia video graphic card that supports higher resolutions, but I am stuck with a unknown monitor and a choice of 640 x 480 and 800 x 600 resolution.  I am not good with commands, so if anyone can help me, please be detailed about a solution.  Thank you...

I have an Nvidia GeForce 7300LE and a GeForce FX 5200, with four monitors.  Back in the days of Feisty Fawn, I tried getting this system to work with Ubuntu, but had a problem being able to drag windows from the display of one graphics card to the display of the other card.  Is this resolved in the current release?  What will I need to do to configure it correctly?