Help retrofitting RXP 530 and WX500

I already have the GNS430 and WX500 in, but want to put a GNS530 instead. So the cockpit looks like this:http://en.wikipedia.org/wiki/File:FedEx_Cessna_208B_Grand_Caravan_cockpit.JPGGNS530 on top and WX500 belowCan someone help? Thanks!