Extend Object Model for BP (new custom field)

Hello Experts,

I am quite new to SAP. Recently I was given a task to create a custom field called "Agent" (used to select an individual account) and display it on Web Client. I had to use Extend Object Model for Business Partner in SPRO. I've walked through the guide, published on http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/4048d161-9ac1-2e10-3bbf-baef73d78109?QuickLink=index&… . I've created Key, Structure, Class and Table with two elements (bp_guid and char).

Now I wonder how to add new field to Web Client using (I suppose) transaction BSP_WD_CMPWB. Please help me walk through it.

Thank you in advance.

Best regards,

Andrew