looking at visible imagery, Frances is exhibiting the dry slot around the eye that is typical of category three hurricanes moving through areas of dry air or cooler water. This one appears to be moving through dry air, as seen on the wv images over the past few days

Frances will not make it to category 5, and may not even strenghen back to a four.

I think it will go about 50 miles east of Cape Canaveral on Sep 4/5 and then go into Cape Fear with winds at 105-115 about 18 hours later

as for Gaston, it has an excellent chance of regenerating if it is not over land for more than 24 hours more
Danny did regenerate to 50-60 mph on July 24 1997 off of the Delmarva Peninsula