How can I replace the vB internal attachment system with Photopost forms? Importing?

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I'd like to get rid of the vB attachment system and get everyone on Photopost Pro when I launch it. What do I need to do to incorporate PP into the post reply - attachment area? Is there already a mod for this?

Also, I want to import all the user attachments into their respective member galleries within PP, and then replace the references throughout the threads so all the images use the same system. Has someone done this, or how complicated of a script would it be? Someone feel like writing it? I know other people would use it.

Thanks.