It is good to see a valuable partner (and competitor) like Citrix to leverage the VHD Test Drive. They are a long time partner of the program. You can download Citrix EVA (Citrix Evaluation Virtual Appliance) from their website.
From the website: What is the Citrix Evaluation Virtual Appliance?
The Citrix Evaluation Virtual Appliance (EVA) is a new pre-configured, ready-to-go, virtual machine system for evaluating Citrix Presentation Server Platinum Edition™. Based on a Microsoft .VHD Test Drive base image of Windows 2003 Server R2, the Citrix EVA will enable evaluators to interact with the Citrix management interface, and evaluate our application delivery infrastructure from both the administrative and end-user perspectives within as little as 10 minutes after completing the download.
Source:→ VolkerW's blogCitrix, PS 4.5, VHD, Virtual Server, Virtualization