Customize Openbravo ERP implementation

We are a small R&D firm in Singapore that would like to use Openbravo ERP to manage our Procurement system. We have installed Openbravo appliance on our VMware and like its usability, however we are lack of internal expertise to map our business to process to the system, as well as doing functionality enhancement / customization. Some of customization that would be required: 1. Add new fields: (a) Asset Number at Purchase Invoice Line. (b) Tracking Numbers at Goods Receipt Header 2. Pop-up reminder to add "Asset Number" for per-item-cost of > $3000 3. Tailoring the Purchase Order format to our requirement. After the project completion, you will be required to do a system walk-thru and training via web video conferencing (such as Skype or other form). We will also need 1 year of support service of the system from you. Bidder must have previous experience implementing Openbravo ERP system. Interested party must PM me to get more detail on our business process.