Nice one. That initial '/' was messing things up.. doh!
Ok, so it's working now. I changed $config['userpass'] to '1', so that I could specify a password rather than have it emailed to me. As I don't have any sort of email sending facility setup on this box, emailing a password would be bad :)
This didn't work. Not a huge problem. I connected to the database manually and added a password, but anyone who doesn't know how to do this is going to be stuck before they even start.
Thanks for the help.