Extending WP eCommerce Plugin

I intend to extend the exising WP eCommerce Plugin for supporting and managing owners. For the time being my objectives are broadly listed as:

1. product owners and profiles
2. capability of owner to upload his products and define their meta information
3. credit points assigned and managed for each owner
4. every successful transaction (ie every successful sale of product) leads to addition of credit(s) to respective owner.
5. right with the admin to manipulate (add / subtract) the credits for each owner.

My first question is, have you heard of a plugin to wp e-commerce plugin, or otherwise, that does similar job of supporting and managing owners?

On the otherhand, if I have to build this functionality,
My approach would be:
managing a list of owners - I would use the wp_users table to add the data. define a new role and capability for product owner and assign him with a new meta property of credit points.

The next - to associate every product with the owner - means adding a new field to the table wpsc_products_list. and this definitely ends up HACKING THE PLUGIN.

Then creating the credit system management also seems to be leading to hacking the plugin!!!

I want to avoid hacking the plugin as far as possible.

Now that is how I think I will handle the task... Suggestions/comments & workarounds please

and yes, if this (or anything close) already exists... please do inform

resources:
wordpress.org
http://getshopped.org/resources/docs/get-involved/extending-wp-e-commerce

 

I am looking to do something similar. What did you end up doing? What would you recommend?

 

The project was abandoned. The patron was not further interested. Probably he found a better option/solution.

thanks
r