In addition, for more help with Services (on top of the reference Poppy made) you can try the network's #Help channel and/or the network's website. If you don't know the network address the #Help channel should know, or search
Google. Remember, mIRC has nothing to do with network's services, they are unique to that network.
The mIRC options area (the 'Full Name' and 'Email Address' section I think you were referring to) is greyed out once you connect. You can disconnect and then go to options and change them, or simply type
/fullname New Full Name and
/emailaddr [email]new@email.address[/email] when you're connected, then next time you connect they would have changed. Once again, these have nothing to do with nickname registration on a network, they are shown with the /whois and CTCP Finger commands respectively.
Hope this helps :-)
Regards,
