Add $ to end of machine account uid

I need machines to be able to authenticate so that when a user who has never logged onto a computer can, by the machine have an active network connection and pulling the credentials from the samba-ldap domain. I have a realm setup to strip the domain/ part of the username which works fine, but I need to figure out how to add a $ at the end of anything that tries to connect as uid=host/computername. I'm sure I can figure out how to strip the host prefix, but can't quit figure out how to add the $ to the end. Thanks. -- Cody Jarrett IT Freedom cody.jarrett@itfreedom.com Office: 512.419.0070 Fax: 512.419.0080