word 97 - envelopes bar code

Yes, if you look closely at the bar code, it is just a field (select the code and hit Shift+F9). You can place the field anywhere.
I understand that the post office prefers it on the top.
You'll have to do it "by hand" You can't (if I remember right) move it in the address wizard in W97

When you go into the Tools menu, then Envelopes and labels. When you see the address you are sending to click on the options button. Click the option for Delivery point Barcode- only available for US addresses.

The same holds true for the Mail Merge Helper, it will ask be a button when your setting up the field layout. Just click on insert Postal Bar code.

Any Questions please E-mail me!