Is there away you can make "Contact Roles" an automatic necessary field when making a new opportunity?

Maybe it pops up or something?  I only have "professional" edition so I don't think I can use triggers.

Thanks.

Hi there - I work in the publishing industry where we use letter territories to determine which reps can call which companies.  (A - gets to call ABC company).  I have created custom fields on the campaigns page for each letter (A, B, C, D, so on and so forth) and I would like to - as reps make closed won sales, each letter to total up the total value won opportunities automatically for that letter.

i.e.

Alliance Company - $2490.50

ABC Company - $1549.50

Another Company - $449.50

The custom field A would tell me that the total value won opportunity for the particular campaign your on is...

A - $4,489.50

So to pull this it would be related to the "Campaign Name" and that particular campaigns total value won opportunities.

Is this possible?

Thanks.