To obtain these bonuses, you and/or your partner cannot use a continue. The bonuses are found just before you reach the final Boss. If you select the parking entrance, continue until the "security guard" chases you twice. After the second time, look to your right and you will see three to four barrels. One of them has a bonus in it. If you do well enough, you will get some boxes with items in them before you face the Wheel Of Fate.
Complete the game with an "A" rank, then enter the options screen and select "House Of The Dead 3". You can now increase the credits past nine until "Free Play" appears.Alternately, earn better than an "A" rank one or more times during the game at the point where you lose all your credits. This works best in one player mode.
After Rogan and G are done talking, you will see Daniel and Lisa talking. Then, Lisa will start walking ahead of Daniel. Daniel will tell her to wait, then he will start talking to himself. They will then walk off.
After Rogan and G are done talking, you will see Daniel and Lisa talking. The same thing will happen, but then you will see a van moving. After that you will see the last zombie driving the car. Lisa will say "Come back you slimy bastards", and start running.