My front wheels are running negitive camber i think (the top of the wheel sticks out more than the bottom?), it was like it when I picked it up and has killed the tyres!
It had new ball joints on, could this have effected the camber of the wheels if it wasn't done correctly?
That will be positive camber.
Standard Mk3 Golf front camber should be between -0.20 and -1.00 degree.
Running the wrong camber will wear your tyres down pretty quickly usually on the inside or outside edge. Any changes to your suspension or steering rack will have an effect on your steering geometry. So you should get it checked and reset shortly after making any changes.
Setting your camber to maximum both sides will not guarantee that both sides are set to the same camber. You can buy camber gauges for anything from £30 upwards, or look for a local branch of Protyre if they have them in your area, they set my camber for £7 a side plus vat.
Paul