I have no idea with the password thing, I thought that was native to the phone. Gimme a bit and I'll play around with it.
Uninstalling is easy. Press and hold the icon for about three seconds. All your icons will start to shake. When they're in this state you can move them around, arranging all your screens, and those that can be deleted will have a black X in their upper left corner. Press it, and the app is gone.
You can also delete apps through the settings menu
Settings->General->Usage
This will show you a list of what you have by size. I find that really useful. Selecting any of the apps in this menu brings up a screen with a large "delete App" button. They work the same, it's whatever you prefer.
no subject
Uninstalling is easy. Press and hold the icon for about three seconds. All your icons will start to shake. When they're in this state you can move them around, arranging all your screens, and those that can be deleted will have a black X in their upper left corner. Press it, and the app is gone.
You can also delete apps through the settings menu
Settings->General->Usage
This will show you a list of what you have by size. I find that really useful. Selecting any of the apps in this menu brings up a screen with a large "delete App" button. They work the same, it's whatever you prefer.
Let me get back to you on the password screen.