Only one side is adjustable - the near/passenger side.
Lengthen the steering rod arm to give you more toe in, shorten it to give more toe out.
For a quick fix before going to the tracking centre then turn the steering wheel until the offside wheel looks straight (from the front of the car, 3m away), then adjust the nearside to match.
I really do recommend a Gunson Trackrite though, cheaper than rrp at Machine Mart, easy to use and gives excellent results - reinforced by my tyres lasting very well indeed - the tracking is good!
http://www.gunson.co.uk/item.aspx?cat=676&item=1812Paid for itself about twice over so far