Good on you for having a go!
I came across this method a few months ago, and I must admit it does work. I'm not sure what type of camera you have, but you can use a dslr or a ccd in this situation.
Its very simple, and accuracy of polar alignment is only subject to the length of your exposure, the longer the exposure the more accurate the polar alignment.
It will certainly come in handy when those batteries run out on the illuminated reticule when you are in the middle of nowhere
You can read about it here:
http://www.skyinsight.com/wiki/index...D_Drift_Method
Cheers
Mark