So I thought I would blog on this one as I had a nightmare this morning finding this.
So the first thing that you want is IIS 7 installed.
Control Panel ->
(If you are in Classic View change it back to Control Panel Home)
Programs -> Under the Program and Features list click on "Turn Windows features on or off"
Select "Internet Information Services"
Open the tree to show a more detailed view of the items under it.
Open the node "World Wide Web Services"

Open the node "Application Development Features"
Select "ASP"
*At this point I selected everything but for security reason you should just select what you need.

Click "OK"
To get to manage IIS you need to got into the Administration Tools in the control Panel . The easiest way to find that IMHO is change control panel back to Classic View and go through the normal Administration Tools -> Internet Information Services (IIS) Manager
I add IIS Manager to Quick lanuch to make it more simple to find in the future.
HTHS
Labels: IIS, Vista