Hi! I will teach you how to make dual client!..
step 1: you must download vm ware workstation..
torrent- isohunt.com
serial key at youserials.com
and install..
step 2:after you installing vmware workstation..
Install windows xp in vmaware workstation..
step 3:Install grand chase in your virtual machine..
and that's it!.. dual client!..
warning:your pc must have a high specs...Processor: dual core or higher..