hoods are fiberglass, i had to fix mine, just put a piece of sheet metal to hold it togher, put that on with rivits, then re fiberglass it, grind it/ sand it, then repaint it. thats what my dad did with mine and he used to do auto body repairs so he know what he's doing.
This site has a great bulletin boad about half way down the page. Go on there and ask away, they are auto repair pros and know how to fix fiberglass ect. Just remember you will have to rough up the inside of the hood to make a big patch area or it won't hold. The rougher the better. Those fiberglass patch kits at Wallyworld and auto zone work as good as any. If you have to glue it together because there is no surface area large enough to use glass mat they do make some hi tec bonding agents by Fusor. Pricy but strong enough to bond panels on cars at the factory. Finish any low spots using Fiberglass Bondo(green) not the cheap **** for $4/qt ( the pink stuff) . Sand with 80 grit to shape finish with 220 wet or dry paper , prime and paint with good paint. Don't use the Wallyworld $2 / can stuff . You can get good stuff at a dealer or maby auto resto supply that comes in a spray can. Should be good as new,( nearly). If you have any places need sealing up 3M makes white sealand adhesive called 5200, Home depot or marine dealers ect. They use it to seal holes drilled in the hull of fiberglass boats and its as strong as the stuff holding the windshield of your car.
Before getting into the figerglass thing do check that it really is fiberglass and not plastic like the hood of my Z24. If you don't see any fiberglass matt in the edges of the crack it is plastic and better fixed with those FUSOR products from the auto repair store. Do it right as a skidoo hood is real thin, supported badly and gets a lot of vibration.