New too flight sim

Hi guys. IM new too FSX and am enjoying it on the whole besides the default scenery. Im from new zealand and looking round it seems like my countrys been through a 1 year drought :-? I need better scenery! too do my country justice. I tried installing the fsx new zealand terrain mesh download 32 MB from this site but i have no idea how to install and get too run and im also thinking the mesh will only change the shape of hills and mountains-will i need a extra download to change city and rural colours and details so the grass can be a bit greener
A little help for a novice would be kindly appreciated.

A little help for a novice would be kindly appreciated.
