ADD on Image

Hi

I've created a addon on image which contains a Load of VHD files for a server Training course that we run here.
On add this to the build process the image failed to start with windows unable to boot.

All I wanted to do was drop and large amount of files on to a folder on the c: called base.
Can anyone think of where I went wrong. I'm going to test again and see what is happening.

Any ideas would be much appreciated

Thanks

john