DSTV Explora Installation

Hi All

Anyone have any experience in upgrading to the Explora decoder? I am currently running a HD PVR (Watch 1 Record 2 - Not sure of model number) as my primary decoder and have XtraView set-up for a secondary HD PVR decoder.

Would it be a simple plug and play or do I need to get an accredited multichoice installation guy to go onto my roof and replace anything on the dish? Would appreciate any advice.

PS -based in Centurion.

Thanks
Cust