Sysprep: xml vs. inf in GSS 3.2x

We are moving to a clean installation of GSS 3.2x from our long-standing 6.9 system. Distribution of an image in the 6.9 system defaults to a sysprep .xml file. In GSS 3.2x the format calls for .inf. We want to use our existing Windows 7 image and xml file but are uncertain about how to proceed. I have tried changing to show "all files" and select the xml file but GSS 3.2x does not seem to use it. How can we use the sysprep.xml in GSS?