I have a few ideas and I want to know if they would be possible. So, I'll jump right in:

1) In my game, I have a series of small levels that I have stringed together. When the player walks down a hallway, for example, he reaches a certain point and gets a short loading screen. However, I would like to know if I can take out this loading screen altogether. Is it possible to put a marker in the level at a point a bit before the loading point that would begin to load the next level in the background? So that when the player reaches the real loading point, he can continue playing right onto the next level without an interruption from a loading screen? This could be very cool, if it is possible.

2) Is it possible to create a marker of some sort so that any enemies in the marked area would be transfered over to the next level when the player gets there?