|UPDATE: I've posted detailed instructions with screen shots here: Click Here|
If you are not familiar with IRC you can instead do this through your browser. Here are the instructions.
Go to mibbit.com
you don't have to sign up, just look a bit farther down and click on Launch App
You will see a window labeled Connect. StarChat isn't one of the choices in the drop down menu so, instead, to the right of the window, click on "server"
That will open up a new little area. Where it says Server, cut and paste this: Amistad.MA.US.StarChat.Net
Choose a nickname and type that where it says Nick
Where it says Channel type in #dealsplus
Then click on Connect