Here's the link for the download: http://www.microsoft.com/downloads/details.aspx?FamilyID=67f93dcb-ada8-4db5-a47b-df17e14b2c74&DisplayLang=en

Overview

The Microsoft VHD Test Drive Program provides customers with an enhanced server-based software evaluation experience that’s faster, better supported and more flexible. You can now access the entire catalog of pre-configured Microsoft and partner products and solutions in the VHD format and start evaluating and testing today from www.microsoft.com/vhd.

This download enables you evaluate Microsoft Office SharePoint Server 2007. Microsoft Office SharePoint Server 2007 is an integrated suite of server capabilities that can help improve organizational effectiveness by providing comprehensive content management and enterprise search, accelerating shared business processes, and facilitating information-sharing across boundaries for better business insight. Office SharePoint Server 2007 supports all intranet, extranet, and Web applications across an enterprise within one integrated platform, instead of relying on separate fragmented systems. Additionally, this collaboration and content management server provides IT professionals and developers with the platform and tools they need for server administration, application extensibility, and interoperability.
This fully functional pre-configured VHD provides you a trial software will automatically expire after 30 days.
This is a pre-configured virtual machine contained within the Virtual Hard Disk (VHD) format. Virtual Server 2005 R2 (Free Product) is required to run this VHD. Please refer to the system requirements section for more details.

No installation is needed, if you already have Virtual Server, and if not, it's a simple and free installation.

Link to Virtual Server 32-bit version (Runs on Vista, Windows XP or Windows Server): http://www.microsoft.com/downloads/details.aspx?familyid=BC49C7C8-4840-4E67-8DC4-1E6E218ACCE4&displaylang=en

~ Robert Shelton