I have the same problem, setting up a shop to sell antiques & art.
The way I understand it, a shipping module (e.g. Royal Mail') 'reads' dispatch address, destination address, quantity & individual weight from the item description entered in admin, then uses this information to calculate the cost of various shipping options.
Royal Mail charges a lot more for an oil painting because of its awkward shape. However, there is no way to include this fact in the item description, so the module cannot take it into account.
The best I can come up with is to suggest looking up the standard price & the 'unusual shape' price, then increase the stated weight of the item until you make up the difference. You would need to mention this in the item description, so the customer does not think they are being overcharged.
As long as the module only calculates the cost & adds it to the total, this might work. However, the extra weight that is right for one destination country might not be right for others...
In my client's business, every product is unique, so this a potential show-stopper.
Any antique dealers out there who can help us out, please?
My Zen Cart Site: www.shoppz.biz/lefays
ZC 1.3.8a, Silverfish, Image Handler2, et al
"You're only young once - but you can be immature for ever"