There is a very active filemaker user group in the Dallas area run by Taylor Sharpe:
I would suggest contacting him, seeing if you can find a local person to assist you. At least you might be able to go to a meeting and see if someone can stay late to help you.
If it's mission critical, I would suggest hiring a consultant to assist. There are many consultants I am sure would be happy to help you remotely, and if the time requirement is low, the cost would be cheap as well. The other reason I would suggest hiring vs "off-the-cuff" assistance, is that you'll get more "interested in assisting" answers, and be able to hold the answers accountable.