http://nopstore.wordpress.com/
most of the steps for Multi Store support has stayed the same.
the Multi store, at the moment, does not support stored procedures (supported by nop 2.2)
It will be fixed soon.
I have added a step seven which is an update to the Nop 2.2 version.
Step seven deals with bulk product variants edit
The demo store is still Nop 2.0
I will update the demo store and upload a full Nop 2.2 solution soon
hezy