Jesus Is Alive by Ron Kenoly

[musallio]

Hi there, I'd like to know how one should play this song  ( Jesus Is Alive by Ron Kenoly) on the keys ( if there is no band).

http://www.youtube.com/watch?v=XLsE73UA7Xw

& what would the chords look like..

Say, I decide to play the brass part on the board, how do I know which chords to play & where should I set the pitch wheel to get the accurate sound?

Thanks in advance.