From memory toyota released a 1000cc race engine with both supercharger and turbocharger opperated by some kind of electric clutch...or somthing like that
the SC would kick in from the word go up until the turbo started spooling then it'd drop out, well somthing to that effect
as to how hard it would be to do, not sure
there are probably some draw backs to this kind of set up as it doesnt seem to be widely used(if at all?)