how do stop the tyres rubbin round corners and humps with cutting up the inner mouldings?

or will have to?

cant afford low pro's

what do you mean the inner mouldings inner arches?

and if youve had lowered springs then you might be able to fit some assistor rubbers usually used when towing a caraven but I've found they stiffen your springs thus stopping the rubbing or you could get your arches rolled, but your descrition is quite vague