Internal wireless antenna direction

[Lenny2]

Is it possible to redirect the internal antenna or maybe add an internal antenna to my laptop?

I recently installed a program to indicate my real-time wireless signal strength (inSSIDer) and it seems that my laptop likes to receive from the left side. This is a problem for one location I spend several hours. I find a 10 to 20 dB gain when I rotate the laptop 40 to 180 degrees. Of course, I can't ergonomically use the laptop in these better positions.