Hi Shim
From your reply�s I take it you are using a MAC rather than a PC (Logic only works on a MAC) which has good programs available, but tend to be more expensive.

Another option (Keeping your PSR710) is Kore 2 http://www.native-instruments.com/#/en/products/producer/kore-2/ which comes complete with a hardware controller, that could control your PSR710 and VSTi simultaneously. (Its Performance Pre-sets are similar in operation to Registration pre-sets in that you can program them to set up all your sounds form whatever combination you choose. (Just turn Local Off on your PSR710)

Hope this helps

Bill