I'm really not sure what the problem is with mIRC. As far as I can tell, I'm basically taking the same steps. Of course, the interface is a bit different, so perhaps I'm missing something. Doesn't matter a whole lot to me, though, because I like HydraIRC a lot better anyway.
As for the location of the address...they're both listed on the same page. The blitzed server is mentioned towards the top when you go to login to chat with Zero. However, I was looking further down on the page where it gave instructions on how to connect. Basically, I didn't realize that the instructions were old, and I didn't notice the mention of blitzed up at the top.