omg dude i could kiss you =]. thankyou so much!
the basic concept is to be able to draw out conveyor belts, so if i chnage the proporties of the line object to apply a force to any object it touches, that should work.
my only concern now is the stretching, i want to replace the black line with a texture of a conveyor belt, say with arrows showing which way its going. now i realise this texture will stretch as i make my lines, any way i can avoid this?
thankyou again for your help. i can nearly start level design