In an Import PO , Data should appear automatically

Hi All,

         Kindly need help for the below urgent requirement.

In an Import PO, We have separate Vendor for Freight and Insurance , Which can be put in Conditions tab, details screen of item details.

Since same vendor is used for long time , I want the same to appear in the field by default. Also Insurance , Freight value should appear in respective fields for import PO ' s automatically by default.

Thanks in Advance.

Shashi