How to command 4 servos with arduino duiemilanove

Hi guys. I am building a stereo ir / light vision to detecd object and light source position for my robot. There are 2ir sensors, 2light sensors and two servos that rotate sensor to determine position. He use another two servos to move around. I know that servo.h can move only two servos plugged to pwm 9 and 10. But....is it possible to write a code that command my two vision microservos plugged in another two pwm (5 and 6 for example)?

(sorry, my english is trash)

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1245026225