sky+ without card remote control problem

Hi , I have a sky+ sd box without a card which I wish to use in our spare room to watch the freesat programs.
The box works fine but only a couple of functions on the remote seem to be working.Not worried about recording (I know you have to have a sky sub for that )just want to use the remote to change channels.
The box was bought from ebay and is set to the midlands area, we are in kent how do I change it to get the south east channels by default?
any help much appreciated.

Alan