If you are using Visual Studio Lab Management 2010 RC, the attached Word document covers the Lab Management supplement for TFS RC to RTM Upgrade Guide. TFS upgrade is a pre-requisite to Lab Management upgrade, so make sure you read the TFS upgrade guide beforehand, and follow the steps described in it. Check the pre-requisites in the attached document, before you start the upgrade.
The Lab Management VM Prep Tool is also getting updated and will be released together with TFS 2010 RTM release.
Stay tuned and make sure you visit this post again before you start the upgrade, as we will update the document based on comments from users and other feedback.