How do I update existing contacts to use a new custom form?

The following from Microsoft KB Q290659 describes my problem:

SUMMARY
This article describes how you can update items in an Outlook folder so they open using a different form than the one they are currently associated with.
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MORE INFORMATION
There are several situations where you might want to change the form that is used for all the items in a folder. For example: " You use the default Outlook form to enter 10 contacts into your Contacts folder. You then create a custom form for contacts and enter 10 additional contacts. You want the first 10 contacts to use the new custom form when they are opened.
" You create a custom form for contacts and enter 10 contacts using the custom form. You then import 100 contacts from a text file. The 100 imported contacts use the default form instead of the custom form.
" You drag and drop items from one folder to another. After moving the items, they do not open with a custom form even though a custom form is set as the default for the folder.
A property of the item called message class determines the form the item uses. You cannot change the message class of an item manually. However, you can write Visual Basic Scripting Edition (VBScript) or Visual Basic Automation code to change the message class for all items in a folder.

Question:  This KB pertains to Outlook 2002 and prior.  Does anyone know the best solution to this problem for Outlook 2007?  Recommended 3rd party apps if necessary?