Hi Ram,
Check out this thread on BizTalkgurus, dealing with Excel tie-in to BAM portal:
http://www.biztalkgurus.com/forums/p/9849/19509.aspx#19509
As far as shipping domain EDI, you must be referring to EDI 850 purchase order specification? I don’t have experience in that regard, as I work in the health care field, but you might want to go through the tutorials that come with BizTalk 2006, as they will walk you through some scenarios dealing with purchase orders.
I hope this information will help you proceed.
Daniel.