[Omar]

Store the VI files anywhere on our hard drive. Where depends on how you have your code organized.
Then add the VI to your robot project under Team Code. Or some where else depending on how YOU have your code organized.

If you where asking where to place the VI inside your program the short answer is any where you needed it.
I need to know more about what it is you are trying to do.

The Hold and Release is well suited for the teleop loops for any action you need to be true for a set amount of time.
It is designed to be inside a continuous loop, keeping track of a timer. You set it by driving the Boolean In HIGH. The Boolean Output State will then go high. You keep calling the VI inside your loop and the Boolean Output will remain high until the HoldTime has passed. As you constantly continue to call the VI when the HoldTime as passed the Boolean Output State will go low turn off what ever you had it connected to.

Tell me a little more about what it is you are trying to do.