Partner Functions

Dear all,

Is it true that Customer account group will have to be assigned all partner functions that a customer can have?

I have a customer account group ZDOM (domestic) and I need to create three partner functions: ZS (Sales Employee), ZT (Transporter) and ZA(Sales Agent). Please indicate the procedure to create these partner functions and assign them to a particular customer account group.

Very Urgent

Thanks in advance..

~reward points promised