Over at xtravirt.com we've released a new Windows based GUI tool for creating and customising ks.cfg files.
Paul, our .NET man has taken my original vbs/html script written late last year and transformed it into a really nice little app.
The tool has additional cool features such as loading and saving ks configurations for reuse allowing rapid creation of multiple ESX server builds, automatically inserting post-configuration scripts, and it's all written out in a format that is compatible with *.nix environments so no problems with hidden line return characters.
It's available to download freely at http://xtravirt.com in the download area.
We're looking to develop it further and look forward to any thoughts or feedback to help improve it.
Cheers
Gavin, Paul and Alex
Xtravirt