[otrs] Ticket Search output

Hi, I have some questions about Ticket Search. When selecting CSV on the search page, OTRS generates a CSV file using semi-colons for field seperator. I'd like it to use commas instead but changing the value of 'Separator' in Kernel/System/CSV.pm has no effect. Am I missing something obvious or how can this be changed? Also, how do I add our company name at the top of the PDF when an agent selects Print as Result Form? Regards Kobus