How to add Contact Info Description?

I know how to add or remove contact info fields for the user profile by doing something like this:

http://wpengineer.com/1877/extend-user-contactinfo-wordpress-29/

However I want to find out if it's possible to add a "description" to the right side of the field? (example of a description is like "The username cannot be changed" next to the username field.)

Thank you!