Microsoft supply the following VSTS evaluation packages which you can freely download from the MSDN website:
The TFS Trail Edition is supplied as an .iso disk image file(s) so you must use an application such as Roxio Easy Media Creator to burn the installation DVDs. You can then install the product in your Software Project Environment in the same way you would using DVDs supplied with your MSDN Premium Subscription:
The Team System Virtual PC is supplied as a self-extracting executable file. It can be used to provide an evaluation version of the product on a compatible PC as follows: