Groove Toolkit for Visual Studio .NET (but not 2003)

A month ago, I caved in to peer pressure ;-) and
installed Groove on my test machine, just to
check it out.  Wow.  What a tight product.  It's intuitive, sets
up flawlessly, and sports a beautiful user interface.  The help is
well-balanced, instructive, and updates from the Web on demand. Also, the C# API
reference makes me want to become a programmer or an API doc writer, I don't know which.
The UI is a blend of Web and Win design motifs, the effect of which is a
fluid, funky, modern user experience that blurs the line between online and
offline activities and UI. I've used it it to "groove" with a friend inside the
LAN and occasionally outside the MSFT firewall and have encountered no crashing
bugs or other annoyances. Groove is what I call a "squishy app"; it's
fun for awhile but does not, at least out of the box, fulfill any of my immediate
business needs. Perhaps my manager would be more likely to approve of
it if it supported document versioning...? Nah, probably not.

Today, I attempted to install the Groove
Toolkit for Visual Studio .NET I was hoping to
investigate writing a VSS add-in control for
addition to a Groove workspace.  The Toolkit setup failed with a
message, "The installation wizard detected that Visual Studio .NET is not
installed on your system. Please install Visual Studio .NET before installing
Groove Toolkit for Visual Studio .NET. The installation wizard will close when
you click OK. " Problem is, I have VS.NET on my machine.  I think that
they're looking for VS.NET version 2002, whereas I have version 2003. 
Bummer.  I guess this science project will have to wait for another
3-day weekend.