got a good suggestion from ali amar, but didn't know where to put it, so I'm going to put it here:If you complete leech hunter with 90-99 leeches you'll get the magnum revolver,this gun has only 5 shots in it but most bosses will die with just 1! If you unlock this, then complete leech hunter again with 100 leeches you'll get this gun with unlimited ammo (I know it'll take a while but it's worth it)! Once youdo this you can just stick the magnum revolver on Billy and the normal magnum for Rebecca (or the other way round if you prefer). With unlimited ammo for each gun you won't have to worry about ammo or picking up any other guns, even on bosses! Now that should really get you good times. With this I unlocked boththe rocket launcher and sub-machine gun with a time of 3 hours and 18 minutes.P.S. You can find the magnum revolver on the bed in cabin 202 in the train.Also, I made this FAQ conform to the 79-character-per-line limit, like it has supposed to all along.