No need to reload the tune. But if the battery was out for more than 20 minutes or so, you erased the Adaptive Learning which is a GOOD thing, other than the car may run a bit rough or odd the first few dozen miles as it "relearns". It SHOULD make the car feel quicker... at least, it often does.
07 GT Prem: Alloy, MT, 3.55's, Steeda CAI w/Brenspeed tunes, FRPP Stingers, 275/40/18 Goodyear Eagle F1 A/S on SVT Cobras (OE GT500's), 14" shorty, Wheelskin side scoops & qtr window louvers, A-H rear window louvers, SHR honeycomb blackout panel, Sequentials, Hella Optilux Extreme XY fogs, Silverstars
06 V6: Legend Lime, Pony Package, 14" shorty, Sequentials, Hella Optilux Extreme XY fogs, Silverstars