Raspberry + arduino / webiopi + firmata (python)

Im buildin internet controlled rc car with arduino, arduino motor shield and raspberry.
So how to use firmata and webiopi at the same time.
This codes have to be used in python :
import webiopi
import datetime
from pyfirmata import Arduino, utill
board = Arduino('/dev/ttyUSB0')
but how to use those codes in the same time so webiopi and firmata could work together ?
car web control works like this
web pages picture-javaskript-webiopi macro/funktion from python program -> motor