to drop an item simply select it with the mouse arrow in the inventory screen by holding down the right trigger. this will cause the item to appear in in front of you in the game invironment (if you have enough room in front of you to drop the item) release the right trigger to let the item drop where ever you want it to. please note that sometimes the item will stay selected even after you try to drop. this is a game bug and not because of the profile. as far as the b button being used as a back button. the b button does exit out of game screens in all ways the game will allow. some menu items on certain screens require you to use the mouse arrow to select them. altho this profile was created to be like the xbox 360 version of the game. it is often simply not possible to recreate every detail of how controls behave in the console version of the game. i hope that answers at least some of your questions.