Don't heat it to bend it, Ed...
For two reasons: you'll destroy the outer "skin" that makes it odor-proof, and hose that's made to go around a tighter bend than it wants to can collapse if it's weakened by heating. Cut the hose and use inline radius fittings to go around tight bends...SeaLand sells 'em. Although, the only parts you can't get from from any plumbing supply for 1/3 the price are the hose barbs. Call SeaLand (800-321-9886) and ask 'em to fax you the fittings page from their "Retail Products Guide"...figure out how many 90s and how many 45s you'll need...then take the page to the plumbing supply to make sure you get the ones with a female connection on both ends and order the number of hose barbs you'll need from SeaLand. It'll be a pain, but a lot easier than trying to do it the wrong way.