Trillian Pro 3:
1. Right click Trillian icon on task bar and choose Connections>Manage My Connections
2. If IRC is not listed with your connections then click "Add a new connection"
3. There should be an icon in there that looks like Pacman with IRC to the right of it. If it is there then click it and enter all of the necessary server information along with the other requested information.
- If the icon is NOT in the list of available connections then choose "Plugins" from the large blue menu on the left. It is the second one from the bottom. Then put a check mark beside "IRC 3.0 by Curulean Studios"
Then go back up to "Identities and Connections", click it then start over from #2
Hope that helps...