relationships CCK e-commerce

hi all,

For the project which i am working we need to have 'price' as well 'qty' fields as user selectable from a dropdown menu. also we need to have shippable property for these items too. It should have some random no generation logic also.
How do i achieve all these functionalities?
Guys i am stuck here from long time & i am unable to figure out a soln to this - can you all suggest some way for me to get all these functionalities at one place?
when i am making the item as shippable the price field is becoming static. How do i do this?

The following Snippet, written up and executed as a stand-alone php file (can also be executed in the run-php dev module box), imports into two related CCK nodes, selected fields from a CSV (actually tab delimited, but that is parameterized in the excellent drupal function) data file (in this case, exported from ACT).

I have tested the snippet on various platforms (php 4/5, mysql 4.1/5), always with Drupal 5.0 rc1.

I asked KarenS if it would be useful, and she suggested I post it here, in the hopes of there emerging a discussion to make an import/export module (or enhancing the existing SoC import/export module which hasn't been updated for Drupal 5 yet).