Shoutbox

I had a brief glance through the scripting documentation, but didn't see anything I thought relevant.

Simply put, can I edit text displayed in the chat window?

Say I want to send a message "Blah Blah", can I make this appear in my conversation as "Hello" or something, but still actualy send the text "Blah Blah"?

It doesn't matter what the other user sees, it's just my screen I'm concerned about

Any help would be appreciated