change column of lookup

Hi,

I have a field that requires a customer account number (vendaccount). and in the form ,the lookup help me to select the correct vendor account number, the lookup form shows both the vendor account number and the vendor name.

what i want is to edite this lookup by deletinf the vendor name column of lookup and add another column with a field of vendtable

Thank you

below link might be helpful for you…

http://dynamicsuser.net/forums/p/56634/303103.aspx