i used tape, and stuck one end on the rear wheel at the 9 oclock position and then stretching it out to the front wheel and using my hand just got it to the point where the line was straight and made sure the wheel was straight so the line was as close to 90* as possible then attached it to the front wheel and measure how far off the string was from the rear wheel at the 3oclock position... a bonehead told me how to do it

this is no substitute for an alignment.. im getting one as soon as i get some money