Edit Dropshipping and Fulfillment Management script( Spanish comunication available too_

Hi

I am looking for a php expert to edit, create or facilitate a script or management system for our new project . We are a dropshipping company for natural health products and we need to track :

Resellers Fulfillment needs like :Reseller details, Current Balance, current fulfillment orders,payment methods for their request and more.....

Order details like : Order date, product, shipping address , shipping status , product cost ,tracking number and more......

Product details like : Product name, product code, cost, quantity, etc..........

Inventory Management
Invoice Maker

Has to be a :

Administrator control panel
User with grated rights control panel.( For example user with permission only to enter tracking numbers .
Reseller control panel

Don't need to be automated or connected to any shipping provider or payment method . All information is managed , entered and edited locally .

I am open to any suggestions, different platforms , services or software.

Here is the script link of what i feel better accommodates to my needs but needs some editing, basic editing and options added : http://codecanyon.net/item/all-in-one-business-management-application/4354090

Thanks in advance for your cooperation .

Jay