well, if it has a scoop that is functional (meaning, it is not filled in), you can try a few things...
1) you can attempt a cold air intake from the scoop, running a tube from the scoop to the air filter, but you need to be very careful about getting water in there.
2) you just leave the scoop open to let air in. the air will come in, run over the engine and it just circulates cool air in the engine compartment, but once again, you dont want too much water in there.
you can get those little plug things to fit in the hole in the scoop which you can just stick in there when its raining or something (not such a good idea however if you go withthe cold air intake method though, heh.)