Can i setup Multi-Domains point to a webroot?

Hello,

I want to build a network have multi people.

But i have problem about setup and configurate WPMU plugin.

I want to a website run multi domain. Ex:

- domain1.com
- domain2.com
- domainx.com

And all domains point to a website (the same webroot).

Can i do it with WPMU? What is plugin name?

Thank you so much!