Unless you do some serious modification to the upper strut tower (lifting it), it won't low very low at all on the air struts - meaning, you'd be almost better off just driving it lowered without adjustibility.
As an alternative, here is a hydraulic write-up of a Corolla Kevin from Just Plain Trick did:
http://www.justplaintrick.com/new/projects/05_toyota_corolla
No serious modifications to the car (just the struts), so it can lay and still be removed and reverseable.