Start with a pea-sized amount and mush it flat against the back of the drive. Just be careful not to cover those two little holes on the driver.
If theres too much bass and/or rattle add a little more.Too much though and you suck some life out of the sound. Play with the amount, thats part of the fun.
Sounds easy enough, thanks! Do you think Dynamat would be necessary if I'm not even going to vent/poke holes in the driver?