When you get to the church and are ready solve the children's room riddle (with the Tarot cards), save the game before you do so. Then, complete the game, defeat the Boss and get to the results screen. When you are done viewing your ranking, press X to see what bonus you were awarded. If you killed more enemies with a melee weapon, you will get a Beam Saber. If you shot more enemies, you will get an infinite flamethrower. Save the game in a new file -- do not overwrite your existing game data. Return to the main title screen and select the "Load" option. Load the saved game created before you killed the Boss. Kill the boss again and skip the credits. When you get to the results screen for the second time, the game will count you having completed the game a the second time (because you already have a completed game save data on you memory card). This is much faster than actually going through the game multiple times to get bonus weapons and increase your bullet adjust. Bullet adjust allows you to double the amount of bullets you can get from a single box, depending on how many times you completed the game. If you did this trick three times you can triple the amount of bullets you would normally get from a single box in very little time.