You'll need an Illuminated Reticle type eyepiece to drift align. It has double iluminated crosshairs so you set a star in the centre and turn the eyepiece so ra and dec line up with the cross lines and watch for drift. East-West star adjust for altitude (27 degrees), North-South star adjust for azimuth (south). You can also use a camera and software instead.
I think Andrews has the cheapest Illuminated Reticle ($79+post), it's at the bottom of the skywatcher area.
http://www.andrewscom.com.au/site-section-10.htm
Good Luck
