Date format in SQL express 2005

Hi,

I want to chnage the date format of my SQL express 2005 instance to be dd/mm/yyyy instead of mm/dd/yyyy. I've look around and found out that I would have to add the french language. To do that I need to use a store proc "sp_addlanguage". I can't find any store proc of that name and I don't want to use the "set date format" at each connection.
Is there a way to do that, instead of reinstalling SQL in french?

Thanks