Class doesn't matter with multiboxing, the programs don't do anything but send one key press to two or more different instances.

ISBoxer questions can be asked here {the creator posts here regularly and there are many users here}. You can also use the ISBoxer chat room or even the Dual-boxing chat room.

http://isboxer.com/index.php/chat
http://www.dual-boxing.com/webchat.php