You will need the help of Notepad++ in order to edit the channels. Once you have installed the application, access the path below and open the chlist_live.txt file. Use a channel information from the file and then modify yours accordingly. Once you are done modifying, close the file and restart SopCast. The new channel will be seen in the channels list.
Channel list: C:\Program Files (x86)\SopCast\channellist