Couple of options from one backyard mechanic to another.
1. Put your flywheel on your BBQ on low heat for 10min, then with some heavy duty gloves try to install quickly. The heat should grow the flywheel by just enough. I have done this before when shifting ring gear (the bit the starter turns) from one flywheel to another and it works a treat. I know it sounds a bit redneck, but this should work. Alternative is an oxy torch to heat it up, but can be hard to get an even heat with an oxy.
2. The press method with the flywheel botls 1/2 turn at a time should work. Just take it easy.
I'd say heating it would be the way to go thou. Hope that helps.