In addition, if you wanted to add to the channels folder list that you currently have without changing what is set by default with mIRC, I think you'd have to use the /writeini command. The favourites list is stored in the [chanfolder] section of the mirc.ini file. Use
//run mirc.ini and use CTRL+F to find the appropriate section. Note that by default the last channel should be n84.
As a quick example, if you wanted to add #Test with description "This is a test channel" and no other settings, you might do
//writeini $mircini chanfolder n $+ $ini($mircini,chanfolder,0) #test,"This is a test channel" - This should add it to the appropriate section. For further info, see
/help /writeini.
I think Merlin's mirc.ini help file is a great one to use for things such as this as it helps you determine where things are in the mirc.ini file and the format in which they are written. The latest version is for 6.12. It can be downloaded
here.
Edit: changed /write command to what Iori displayed below, avoids confusion!
Regards,