UKchatters is now well established, lots of chatters on it , worth a try.
On first script start, click "setup" button on toolbar. This brings up a setup dialog popup. Click each button on it in turn, 1,2,3 if you need to make a new account, or just 2, 3 if you want to use an old account. Fill in details on each button popup. You only have to do this once, on first script start. If you've done it right, its all auto from now on! Have fun.