Bobbi, are you sure it's not a pumpkin?
Actually, if it's a "winter" squash (hard shell) I would imagine that all of them get cooked about the same: Remove the "flesh" from the shell, and boil like you would a potato, unless it's small enough to just halve and bake in the oven. A notable exception is the "Spaghetti" squash, which has its own recipe.
Good luck!
I like my squash with a
little bit of salt and
lots of butter...
Much love and