Pre and Post M90 setup need help

[993]

Hi guys, I need some help here. I am new to this WI so please bear with me. I have a porsche 993 that is supercharged with the roots m90. I also run a water to air intercooler, The blower is getting heat soaked. I would like to run a pre blower and post intercooler setup (to keep combustion chamber temps down) and to run a little more boost. currently running about 5.5 to 6 psi. Would like to run 7-8. Could someone help me as i am unsure how to setup up a dual system? Do both spray at the same time? as i have read that pre blower all the methanol will be disapated before it exits the blower? so that was why i wanted to spray after the intercooler. but not sure on the amounts to spray, because you spray pre blower do you then send less into the intake? would you spray them both at the same time? please help? oh the car had a 3.6l flat 6.