what's a sharkie?
i think you'll need more than 1 bottle of gatorade. i'd check out running websites (like mags... i think one is
http://www.runnersworld.com) and see if they advise anything.
for future marathons, see if you can find online or get training info from the marine corp. marathon that's held in DC every year. my brother did that and they had a training regimine that they had people follow. he did it and it worked great for him.