Set Locale

We have a classic ASP site running on IIS 5. We will be using a com
component to handle session state so we can share state between .net and
classic. This means switching the IIS session state off. Prior to this
locale was set in the session. Switching the session off means the dates
start displaying in a US format, not British. Is there any way of setting
the Locale as UK easily. As it is IIS 5 we can't use response.lcid, I don't
want to mess around with regional settings on the machine as our
applications aren't very well designed :) and I will get the blame for
breaking them. I don't want to put a page directive in over 1000 asp page.
Is there anyway of setting it at an application level in IIS. Regards,
Chris.