Usually, when I add a new website under IIS, I create a new instance in CF9, and use WSConfig to map the instance to the website. Its a straight-forward process.
With CF10, I can’t seem to find any documentation on how to do that. Running WSConfig no longer has an option with a drop-down of instances, so I was left scratching my head.
Adobe’s notes @ http://help.adobe.com/en_US/ColdFusion/10.0/Installing/WSc3ff6d0ea77859461172e0811cdec18a15-7ffb.html have no mention of instances.
After much digging, I figured out that you cannot use the Web Server Configuration Tool in the Windows menu, rather you have to go to \*cf dir*\*instance dir*\runtime\bin, and run wsconfig.exe and select the right website from the drop down.
Essentially, every time you create a new instance, you have a new wsconfig.exe that you will use to connect that instance to a website. The one in the Windows menu is only for the cfusion instance, which makes it useless if you are used to a more advanced setup, nor is this documented very well.
Why in the world, when you had the flexibility before, was that taken away and not documented well? Adobe!!!