Adding fields to Order screen to update in created Opportunity

Hi.

Wisdom needed, please.

I have an order form that, on promoting to Sage 100, creates an Opportunity. We would like to:

1. Add fields to the Order form that mirror Opp fields. (oppo_source, oppo_type, oppo_acginitialcommtype)

2. Upon promotion, the info placed in those fields become a part of the created opportunity.

Right now, if we begin in the order screen, we have to go back into the created Opp to update

and that is a waste of time.

Is this possible?

If so, how?