Experiment with the strumming for what you feel, but i like to use a down, up, down, up, 
up, down, up reggae pattern for each chord focusing mainly on the higher strings.
  (I'm drivin'..down the coastline..ridin'......with my windows down.)
e|--5-----------5-------------------7-----------5-------------------|B|--7-----------5-------------------9-----------5-------------------|G|--7-----------6-------------------9-----------6-------------------|D|--7-----------7-------------------9-----------7-------------------|A|--5-----------7-------------------7-----------7-------------------|E|--5-----------5-------------------7-----------5-------------------|
  (I can't.....(cause life is good..(I wish I...(the radio.)
  complain)                but man)   was on)
e|--5-----------5-------------------7-----------5-------------------|B|--7-----------5-------------------9-----------5-------------------|G|--7-----------6-------------------9-----------6-------------------|D|--7-----------7-------------------9-----------7-------------------|A|--5-----------7-------------------7-----------7-------------------|E|--5-----------5-------------------7-----------5-------------------|
Continue with this rhythm for the parts where Loggy raps but maybe play around with 
different strumming patterns.