[Zope] Using database-connection from external methods

Hi! This will hopefulle be my last questions in a while... Is there some way I can reach/use ZMySQL connection method from within an external method? Rephrase - I have a connection established within Zope - I want to call an external method that handles some sql-queries - is this possible, or should I still have the external method handle it's own connection? Can external methods set/send back variables to the calling document/method? Another question while I'm at it - is the DateTime module in 1.10.2 broke in some way? (I get an error if I try to make a new property with the date type set) Help is much appreciated Sture Lygren