I'm not always so harsh - click the link sometime you are at a laptop or something - and read the sticky's also - most of the stuff you're asking about is there. Even how to post pics in hear...
Air shocks are not for offroading - coils and leaf packs are. The airshock lift is probably stiff as hell and not for a light vehicle like an XJ.
'00 XJ Sport, White - almost done for now...
'11 Town and Country - people mover :-(
'88 XJ Up Country, '01 XJ Sport, '08 KK Limited, '98 XJ Parts Donor, '07 XK Limited (the Stall-ander)