Help with redirection in wordpress mu

Attention"Assign to PC"

Hi, before I had written about this via email and I was attending PC.
I want to entrust something, I need your support.
We have the site done in "wodpress mu" http://www.cimaw.com, and http://www.business-ready.info and http://www.ecommerce-ready.info are websites belonging to http://www.cimaw.com network but is working with their own domains.
We subscribe to them with you before, we had already used this plugin http://wordpress.org/plugins/wordpress-mu-domain-mapping/ to make websites http://www.cimaw.com network can run their own domains.
We need your support to solve the following:
when one accesses the network websites mentioned above (www.business-ready.info and http://www.ecommerce-ready.info) without www, the system will redirect to the main page.
How can we do so that the url written in a domain with or without www not any problem with loading the website?
here is the htaccess file currently on cimaw.com: http://www.cimaw.com/htaccess-wpmu-cimaw.com.zip

You guys can help us?