Here's how you can play two realms (or three) at the same time on one PC.
It's easy!
Just download a program called CrossRealm from:
http://daochax.comThis program really works. No bs.
Instructions:
1. Click "download" on the website.
2. After the program installs itself, click it to make it start.
That’s all you have to do. Now you can log into more than one realm at the same time. CrossRealm keeps running till you reboot.
Here's what the program looks like when it's running: