Installing Silverlight 3 Tools on a non-networked PC

When trying to install Silverlight 3 Tools onto a VM with no network connectivity I encountered the following error:

Microsoft® Silverlight™ 3 Tools Installation failed with error code: (0x80072EFD).

This is caused by the fact that the installation tries to download the Silverlight 3 Developer Runtime. This is how to get around this problem:

1. Download the ‘Silverlight Developer Runtime’
2. Open the command line on the machine installing Silverlight Tools on
3. Navigate to the directory Silverlight3_Tools.exe is saved in
4. Run ‘Silverlight3_Tools.exe /x:C:\sli’
5. Copy the Silverlight Developer Runtime installer to C:\sli
6. Run ‘SPInstaller.exe’

Everything should install fine as long as you have Visual Studio 2008 SP1 installed.