the boosts get stacked ...
as in like when you turn it on your boosts dont run out..
go in options
get _____ (<- the boost you want)
go in use boosts ( last option top right )
use ______ (<- the boost you chose etc..)
if you want to stop uncheck start.
you can only get boosts in battleon
and use them every where
its not rocket science people :3