this be teh beloved patriot... (yes yes...it's me...)
well then...
first, if you have 3 extra 5.25" bays, use the bottom ones for an 120mm fan.
if you don't have a window (your bro tells me you want to get a window kit), you might want to try to get one.
for airflow purposes, tinsnip out all the fan grills guarding your front and rear fans and replace them with wire guards.