. Let's see:
1. Create a new file and insert the code I gave you. (let's say exhale.mrc)
2. Copy that file in mIRC directory.
3. Start the mIRC and in your status windows type /load -rs exhale.mrc, then type /set %channel #FirstChannelTo Join, then /set %channel #SecondChannelToJoin ...
4. Connect to the server.
Note: Replace #FirstChannelToJoin, #SecondChannelToJoin with the actual channel names.