I have a couple international customers who are ordering from my wholesale site. I use a flat shipping rate for all domestic customers as the actual amount generally only varies by a dollar or so. However, I do have some international customers and what I would like to do is have Zencart put their orders on hold so I can figure the shipping, update their order, and release/update them for payment.

Is there a way to do this through Zencart the way it stands or do I need some sort of module?

Thanks in advance.