One of the things I noticed about RSAT was that Hyper-V management was missing. After a bit of digging I found out the today the Hyper-V team also released their remote management tools.
Read the blog post here
Vista x64 Edition: http://www.microsoft.com/downloads/details.aspx?FamilyId=450931F5-EBEC-4C0B-95BD-E3BA19D296B1&displaylang=en
Vista x86 Edition: http://www.microsoft.com/downloads/details.aspx?FamilyId=BC3D09CC-3752-4934-B84C-905E78BE50A1&displaylang=en