For work i recently had to use ASP.Net Dynamic Data. Pretty easy to generate some editforms for the various database entities. Late at night at home i tried to do the same, but unfortunately the templates were missing in Visual Studio 2008 (still not using 2010......). After googling around i came across this post where was stated that (re)installing visual studio 2008 SP1 would sovle the problem, it surely helped for me!
Just download the ISO file, unpack (i use WinRAR) or mount it with your favorite disc mounter (Deamon tools for example). After the install my templates were back!!