Hi..its hard not to reply when my name is on the subject
i am sure there a LOTS of people here who can help you if you post precise problem with full details where and what not working for you.
moreover i did not write that script you mentioned nor i have ever moved a postfix+mysql+cyrus setup to zimbra
so please post more info about the problems you are facing and i am sure there will be help here.
good luck
Raj