Q:

405 - ‘Method not Allowed’ adding service hosted in IIS7

I can't seem to get around this problem of adding a web service reference when the web service is hosted in IIS 7.
I can add it just fine if I am running the VS2008 development server, but when I switch it over to IIS I get a 405 error. It seems to be a permission issue, but what?
I've tried adding permissions to 'Everyone' in the folder the service lies within, and adding a script mapping of *.svn to aspnet_isapi.dll.
Anybody know what I might be missing?
Thanks!
EDIT: Added a bounty of everything I have. It seems as though putting this question on SO gets the 'This should be on...' birds out, even though Server Fault is where questions go to die.

A:

<%windir%>Microsoft.NET/Framework/v3.0/Windows Communication Foundation/ServiceModelReg.exe -i
...then
<%windir%>Microsoft.NET/Framework/v2.0.50727/aspnet_regiis -i -enable
This mapped the proper isapi dll's to the *svc extension, among other things.
Bless Microsoft...

