Lockpicking is a lot easier than most people think.
The security skill.... is useless.
Most people say to watch for the speed and all that, but don't listen to them. All you do is listen to when the tumblers go up.
When you hear the one that comes down smooth (without any crunching noises) press A on the next one.
Thats all you need to know. I can pick very hard locks easily using this method.