Ok, I have found my own solution.
You need to start by downloading the installer(s) to a Windows 7 machine.
Once downloaded, I renamed each of the setup.exe files to represent what they were. As such, the x86 version was renamed as setup.net20.sdk.x86.exe and the x64 version as setup.net20.sdk.x64.exe.
Now, open a command prompt in the folder where you downloaded (and optionally renamed) the setup executables and run the following...
- setup.net20.sdk.x86.exe /t:"C:\net20sdk86" /c
- setup.net20.sdk.x64.exe /t:"C:\net20sdk64" /c
Obviously if you choose not to rename the downloaded files you will have to modify the command accordingly.
Finally, copy the folders C:\net20sdk86 and C:\net20sdk64 to your windows 8 machine and then run install.exe from the C:\net20sdk86 and then (assuming you are 64bit) C:\net20sdk64. Note you should run each of the installers within these folders with administrative privileges (right click, "Run as administrator").
The configuration wizards you seek will then show up on the start screen. If they are not there, open the charms menu (from the start screen), select Settings and then Tiles and ensure that "Show administrative tools" is enabled.
Voila!