Installing Visual Studio 2005 Extensions for Windows Workflow Foundation RC5(EN) is failing
It you are trying to install the Workflow extensions for Visual Studio as per Pail Andrews instructions on
http://blogs.msdn.com/pandrew/archive/2006/09/07/745701.aspx you might run into the same problems as I have. The problem occurs while trying to install Visual Studio 2005 extensions for Windows Workflow Foundation (Visual Studio 2005 Extensions for Windows Workflow Foundation RC5(EN).exe) after installing the Visual Studio "Orcas" CTP (vsextwfx.msi). The problem I was having is that the last installer seems to restart the previous one and offers a change/repair/reinstall option, clearly not what I needed. The solution was suggested by Bill McCarthy and that fixed the problem.
The solution is to rename the installer "Visual Studio 2005 Extensions for Windows Workflow Foundation RC5(EN).exe" to "Visual Studio 2005 Extensions for Windows Workflow Foundation RC5(EN).zip". Now extract the zip file to a directory and start the install from there. Now you do get the option to install the workflow extensions and everything works as expected.
Enjoy the workflow :-)