.NET Framework 3.0 redistributable package (Stand-alone version)
In the process of applying MOSS 2007 Beta 2 Technical Refresh update , you require to uninstall Windows Workflow Foundation Beta 2.2 (Build 3807) and then install Microsoft .NET Framework 3.0 - Release Candidate from http://www.microsoft.com/downloads/details.aspx?FamilyId=19E21845-F5E3-4387-95FF-66788825C1AF&displaylang=en that installs the latest version of Windows Workflow Foundation on your MOSS server. The .Net Framework (dotnetfx3setup.exe) that you will get by clicking on the link above is a small redistributable package that downloads the required components during setup.This means that you need to have an active Internet Connection (or ICS) in your server. Since most of us install Beta softwares on Virtual Machines, and on the other hand sharing the internet between host and guest operating systems is a little bit more of a challenge; you may want to try the .NET Framework 3.0 redistributable package that is available as a stand-alone executable file named dotnetfx3.exe.
If you have any trouble locating this file (as I did), refer to this URL then : http://download.microsoft.com/download/D/C/0/DC09D14E-494D-4E5A-A1BA-783554D9D8FE/dotnetfx3.exe