Please consider voting for Manual Shipping Methods with Boxes and Dimensional Weight.
- - Manually add and configure multiple box sizes in shipping methods.
- - Ability to customise the Volumetric Divisor used for calculating the dimensional weight.
This will hopefully also help to champion CS-Cart to further investigate and understand more about the need for dimensional weight in today's global shipping environment.
The last UserVoice for multi-box shipments and dimensional weight was marked as completed in Feb 2011 by imac for v2.1.3 however that is only for vendor specific real-time shipping.
Please vote here: http://cscart.uservoice.com/forums/134344-cs-cart/suggestions/10812429-manual-shipping-method-boxes-and-dimensional-weig
Thanks!