Crystal Server (CRS) or BusinessObjects (BOE)? Is that also version XI?
I don't currently have access to an BOE/CRS XI r1 or r2 system - just BOE 3.1 or CRS 2008, so I'm not absolutely certain what the scheduling options are there. However, when you set the format for the schedule, you should see a checkbox that says something like "use format defined in report". If you uncheck that, you should then see options to define the format, including whether or not to use quotes.