RE: SOAP does not work (Bad Gateway)
Marc, funny that you should mention this. I had the exact same problem yesterday with a customer. What we did was creating a new site, gave it a name "mysuperoffice", and set the hostname to "http://mysuperoffice" with the applications /Service and /SuperOffice.
And then it worked for the customer. I could browse soap.exe from http://mysuperoffice.com/Service/scripts/soap.exe?action=ticket
The setup it self was identic to the Default Web Site, but it seems that the Default Web Site has some settings that disables browsing soap.exe somehow.
Anyway, I would advice you to try setting up a new site (remember to change regedit and the urls in config table as well as ejcrontab.txt and so on).
Give me a shout if you need some help :)