customizing validation script-injection error page.

[EO]

I think i've googled to the end of the internet, but just can't find any
resources to tell me how to customize the glorious error message that says:

Server Error in '/Code' Application.

A potentially dangerous request.form value was detected from the
client.......



How do I post a user friendly message? Or do I just assume that anyone who
would generate such a message is a hacker and doesn't deserve a friendly
message?

Many Thanks,

E. Ostrander