If you are wanting to developer solutions for SharePoint in Visual Studio 2008 then you need a couple of things to get started:
- You will need to install VSeWSS 1.1.
http://blogs.msdn.com/sharepoint/archive/2008/02/11/announcing-the-final-release-of-vsewss-1-1-and-the-upcoming-version-1-2.aspx - Then follow the instructions on Martin Vollmer`s Blog in his post on getting it installed without Sharepoint.
http://blogs.msdn.com/martinv/archive/2008/03/19/new-registry-file-for-developing-moss2007-projects-in-a-workstation-xp-or-vista.aspx - And to get workflow working you need to again follow the instructions on Martin Vollmer`s Blog in his post on getting the workflow dll’s out of the server.
http://blogs.msdn.com/martinv/archive/2008/01/21/developing-custom-moss-2007-sharepoint-workflows-on-a-remote-workstation.aspx
Although this is convoluted it does work…
If you are developing for either of my MOSS Codeplex Projects (MOSS Time Off Management or MOSS Designer Workflow Activities) then you will need this up and running if you do not want to have to install everything on a SharePoint server…
UPDATE: If you can get this to work, you must be a SharePoint developer guru