When the user has products in his basket which are not all available he should be asked if he is prepared to wait to receive a complete delivery (less mail cost) or if he wants separate deliveries (higher cost).
A simple flag function …
Right. Taken over.
If somebody wants to write a module about this and is faster… feel free 
Marco Steinhäuser
Community Guide
OXID eSales AG
I prefer you are faster in Standard
Auction-based car sharing with Google Maps: http://www.drijo.com
BMW Cruiser: http://www.demmelhuber.info/indexseiten/bmw.html
Taken over
means: I put it onto our feature request list. Nothing decided yet 
Marco Steinhäuser
Community Guide
OXID eSales AG