Microsoft recently published two Test Lab Guides with step-by-step instructions for testing performance between headquarters (or datacenter) and branch offices using the Linktropy WAN emulator.
The first guide uses physical hardware for all the clients and servers. It is available here:
http://social.technet.microsoft.com/wiki/contents/articles/16474.test-lab-guide-configure-the-contoso-branch-office-using-an-apposite-technologies-wan-emulator.aspx
The second guide uses Hyper-V to virtualize the branch office clients and datacenter servers onto a single physical server. It can be read here:
http://social.technet.microsoft.com/wiki/contents/articles/16840.hosting-the-apposite-technologies-wan-emulator-based-contoso-branch-office-test-lab-with-windows-server-2012-hyper-v.aspx
Thanks for Joe Davies of Microsoft for putting together these easy to use guides.