How to set up a clustered environment using IIS 7.5 and CF10 developer edition

I have followed following steps to create a clustered environment:

• Created a new instance in CF admin with port no 8500 and the default CF installation runs on 80 port.
• Created a cluster in CF admin and added two instances there.
• Run CF code from both the instances by placing in "C:\ColdFusion10\CFusion2\wwwroot" and "C:\ColdFusion10\cfusion\wwwroot" and both are running fine.

I just want to know how I'll set up the cluster in IIS?? If I'll shut down one instance then my application will run from other instance.

Please guide me if I'm making any mistake or any further steps. Thanks in advance.