Populatng "Internet Logon" user\pass in CMAK Properties

Hello,

I am hoping someone out there could help me. I have set up a RADIUS\ISA Remote Access Solution on Windows 2003 Servers and have created a CMAK Profile (using CMAK 1.3) for deployment to all our laptops. I would like to be able to Populate the information for Username and Password in the "Internet Logon" tab of the Properties of the Dialup so that an unattended install can be done and require no IT intervention prior to usage. I know the user can just put this info in themself, but we dont really want the users to know details for dialin accounts and passwords as they arent as easy to remove/disable as domain accounts are if they leave the company...

So basically I was wondering if there is either a Reg Key we can set (Although I fear it is in the secure/hidden "Security" section of the registry and encrypted) Perhaps there is an advanced option I can set in the CMAK Profile??? Any help would be greatly appreciated!