I have had sucessful breedings for two straight years now. I live in south florida and don't cool. The habit of cooling snakes for breeding started because it is necessary for most North American snakes(like kings and corns).
The temps in the BP's natural range don't vary enough to warrant cooling. The information in the previous post about barometric pressure is interesting though, as the rainfall does change drastically in thier range. Fortunately it does here in South Florida too.

Some climate info for Ghana:
http://www.climatetemp.info/ghana/