Using Little Phatty to get TOM SAWYER sounds?

I am starting a RUSH tribute band as Geddy. So far I have a Little Phatty that I am picking up this afternoon, and a set of Roland PK-5 pedals. Can you help me get that Tom Sawyer pre-guitar solo sound and the infamous Growl sound with these? I am totally new at keys! Thanks a zillion!
Doug
dbjacobson@aol.com