Here's a zip with a couple of examples of how you might do the scrolling:
In vertscroll.cap the layout size is 320x4000. The red box is set to "Center view on me" and both the box and the ship are moved 1 pixel up every tick. The star sprite is a 320x1000 repeatable tile, and there are four of them. The star sprites themselves don't move.
In stars.cap the layout size is 320x480. The stars are much smaller tiles and are created at runtime just off the top of the screen and moved down 2 pixels every tick for layer 1 and 1 pixel every tick for layer 2 to get a parallax effect. The ship itself doesn't move (unless the player moves it, of course).
Hope this helps.