To install the templates manually.
On my Vista 32bit OS I found the templates installed in C:\My_Directory and C:\My_DirectoryVisualBasic respectively.
If you dont find them there search for them elsewhere....
The language specific zip files that you should look for are listed below and are contained in a DevForce Directory:
BOSWebApplicationCS.zip or BOSWebApplicationVB.zip
BOSWebSiteCS.zip or BOSWebSiteVB.zip
DevForceSLAppCS.zip or DevForceSLAppVB.zip
DevForceSLAppServerCS.zip or DevForceSLAppServerVB.zip
Once you find them,
Copy the DevForce Folders (with the zip files) from the locations above to:
C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\ProjectTemplates\CSharp\DevForce\...
and
C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\ProjectTemplates\VisualBasic\DevForce\...
You must run "devenv.exe /installvstemplates" to update VS template cache
The templates should appear in VS2008 as expected.