Although there are a lot of mileage combinations, here is what looks reasonable. Josh Kennedy has all of the variations on this should we need to make adjustments.
Day 1 on May 1. 2010: 52.3 miles Start Flagg Mountain with end Skyway Road Crossing
Cumulative Total Mileage: 52.3
Day 2 on May 2. 2010: 48.7 miles Start Skyway Road Crossing with; end I-20 Crossing
Cumulative Total Mileage: 101.0
Day 3 on May 3. 2010: 54.0 miles Start I-20 Crossing with end CR 70 / Maxwell Gap Crossing
Cumulative Total Mileage: 155.0
Day 4 on May 4. 2010: 48.3 miles Start CR 70 / Maxwell Gap Crossing with end Simms Mountain Trailhead
Cumulative Total Mileage: 203.3
Day 5 on May 5. 2010: 54.0 miles Start Simms Mountain Trailhead with Snake Creek Gap Trailhead
Cumulative Total Mileage: 257.3
Day 6 on May 6. 2010: 46.9 miles Start Snake Creek Gap Trailhead with end Baker Branch Trailhead
Cumulative Total Mileage: 304.2
Day 7 on May 7. 2010: 30.7 miles Start Baker Branch Trailhead with end Benton MacKaye Trail
Cumulative Total Mileage: 334.9