Found it --> http://somersoft.com/forums/faq.php?faq=chat_faq#faq_mirc_faq
I used that with the updated server details. Still took me a few goes though....
If I can figure it out anyone can! Hobo linked to a step by step guide somewhere on here that I used (server details were out of date but just use the ones above) but can't find it again.
Ha! :D