changing "invalid username or password" message - how to do?

[Westweb Tech]

Hi folks - 

I am in need of a way to get a message to non-paying customers when they try to login.

Is it possible to change the "invalid username or password" message to read something else?

Or, is it possible using radius to force a dial-in customer to redirect to one web page only (a non-payment notice page?)

I can provide more info if needed.

I am currently not using freeradius but will use it if this will work somehow.

Thanks,

AW