I just got to run Flopzilla with my Mac via Crossover.
What I did was:
1. Run/open Crossover on Mac.
2. Go to 'Configure' on the menubar, 'Install software....'
3. New window named CrossOver Software Installer comes up.
(4.) 'Select an application to install' -> Scroll down to 'Runtime support components and install 'Microsoft XML Parser (MSXML) 6.0 SP1'
5. 'Select an installer' tab ->'Choose installer File...'
Select the 'FlopzillaInstall.msi' file you download from
http://www.cardrunners-ev-calculator.com/Flopzilla.html
And thats really it.
Skip step 4 first. I've done this because I've read something on the Crossover forum that in order for me to run .msi installers, I needed to install that MSXML thing first...
PM me if u need further help