I'm not a lender, but I do know that FHA doesn't place a ton of weight on FICO scores, but they do have a minimum. They care mainly that you have a good payment history. If your score is too low for a FHA loan, there must be more than one credit issue. Since no lenders responded yet, what I can do is send you some good information I've collected on credit reports and FICO scores. Reading this will help you see what goes into a score, so any financial decisions you make can be done with your credit score in mind. Just email or call me off forum, and I'll be happy to send them to you.
Also, since you'll be buying with FHA, be sure your lender ROUTINELY closes FHA loans in 30 days or less. There's a lot of competition out there with regular buyers and investors, and you don't need a lender who requires 45 days hurting your changes at offer acceptance.
Good luck to you, and don't hesitate to contact me with questions or for help if you're not already working with an agent.
Cory La Scala, REALTOR