Multiple hosts in a single ASP.NET Application

[DeOriginal]

Hi,

This is my scenario

- I have four URLs
www.mysite1.com
www.mysite2.com
www.mysite3.com
www.mysite4.com

- One hosting server (full access to the server)

- Membership is required for the sites (each site targets a different audience group) but the same basic information is kept. Meaning the same user name, password, address info, contact info, likes, dislikes, etc

- Single Sign-On is required when moving from one URL to another

I was wondering the best approach to be taken in setting this up in IIS.

My approach is as follows:
- Create a single website in IIS
- Add the URLs as host headers to the site.
- Create four virtual directories each representing one of the sites.
- Map the incoming domain name to the appropriate virtual directory and render site

I would like to know, if the approach make sense and how do I go about mapping the URL to VDs or if there is another approach I can take.

Would be greatly appreciate it, if anyone can shed some light on this for me.