Hi Philhege,
Changing the 12-hive is pretty stupid, that I already knew.
In fact this is a question I posted for someone else as I am a project leader (with development experience).
To keep a long story short. I seems that a backup of the web.config has been put back into operation. I find this to be a little odd. If you put a web.config.bak file into the root (same folder as where the web application's web.config resides) and after a reboot of the machine this bak file overwrites the web.config. I haven't tested it myself, but this is what they told me.
Regards,
J.