Tricky Business, pick the cast (or Big Trouble)

I read Dave Barry's book, and was like, you know this would be an awesome movie, and then I started thinking just when i was bored once about who should play who in the movie. And then I was shocked one day when I was browsing comedies at blockbuster, to discover that someone had stole my idea, and already made a movie. Oddly enough, i think the guy who made the movie and me picked some of the same actors, particularly Janine Garofolo and Patrick Waterburton, for the lead guy, instead of Tim Allen, I thought the part should go to the guy from Office Space, Ron Livingston, and I pictured Harry and Leonard being black. I don't remember much else, oh, I do remember, I had Jack Black as Puggy.

Maybe they should really do these Dave Barry books justice by turning Tricky Business into a movie with a more thorough effort, and this really is a pretty fun exercize, let's try to pick the cast for Tricky Business:
Wally-Thinking of someone blonde, kind of a deadbeat, looks about 25, thinking Owen Wilson, Paul Walker, and although he's not blonde maybe Josh Duhamel from Las Vegas
Bandmates Ted, Jonny, and Jock-I'd say Will Ferrell for Jock, he has no problem with showing himself naked, can play a big disgusting dumb guy and do something with it, I think Kids in the Hall's Bruce McCollough can play Jonny, the idiot in the hospital with the contusion, and Ted, couldn't really place my finger, thinking of maybe a redhead (I see redhead, because Ted played the piano and piano players are usually smarter and more intellectual, keyboardists usually took classical piano lessons at some point) maybe Seth Green, if his asking pirce isn't too high
Fay-I'm thinking Virginia Madsen, she's quiet, good looking in a very unnoticeable way, but more someone whose strong, independent personality overshadows her good looks, I was also thinking Tea Leoni
Mara-Betty Schram from Monk, maybe, kind of like the low-class Jersey accent waittress thing, I was also thinking Edie Falco since she played a worn-out Floridian so well in Sunshine State
Joe, the bartender-Joe Mantenga from Joan of Arcadia
Eddie-Rob Lowe has that part written all over him, that was just my take
Lou Tarant-Chaz Palemintri, guy from the Vanilla Coke commercials, their are a good number of people who just play standardized mob parts, i'm sure that if this were made into a movie, those guys would be cast into this movie, cause there are so many mob parts to fill
Billy Kemp-I'm thinking William H. Macy, he had that kind of misplaced cockiness and had the voice i waas hearing in my head when i read this, from his part i Seabiscuit as the announcer, and it might be a stretch for him to play Billy Kemp, but Kemp was a character in the book who was hard to pinpoint and Macy could make that part really unique, also I hear Macy is trying to break out of parts that have him typecast as a loser
Arnie and Phil-I think it's tough to find old guys nowadays, Jack Lemmon and Walter Matthau would have been perfect for those parts 3 or 4 years ago when they were still alive, how sad

So to review: Wally-not sure, so far Josh Duhamel, Owen Wilson, and Paul Walker are leading candidates, Fay-Virginia Madsen, Johnny-Bruce McCollough, Jock-Will Ferrell, Ted-Seth Green, Lou Tarant-Chaz Palimientri, Billy Kemp-William H Macy, Mara-Betty Schram, Arnie and Phil-No clue, Eddie-Rob Lowe
Your thoughts?