At this point in time the attachments tab is not accessible with advance print view. However I think I would be a great idea and would highly suggest adding this thought to the Idea exchange, with a little more details on what you would want to be able to do with access of the attachments tab with advance printing.
Has this gone any further?
I have the same need, for my RFQ Work flow,
I have a workflow transition script that uses the advanced view (Thank you Michele for your PLMTalk) to send my RFQ form to the Vendor email on the RFQ record. I have now been asked can this email also contain the attachments that are also in the record.
A simple array property on the Email object I believe would work