Depth Problem

Hi, im fairly new to flash, and im having a bit of a problem combining the grass tutorial from this site with other movie clips and images. Im trying to incorporate the kirupa grass tutorial into a flash file, the grass works great and moves fine. However i want to use the grass as a background with other images or movie clips infront of it. I have tried making them on layers and placing those layers above the layer the moving grass is on, but the grass still insists on placing itself on the front of the screen. Having read around im sure its something to do with depth, but im not sure how I would go about fixing this problem?

The code the grass movie clip uses to duplicate itself, to create the grass effect, is as follows:


for (i=0; i<750; i++) {
_root.grass.duplicateMovieClip("movie"+i,i);
}

Is there anyway I can set the depth of another movie clip that i want to sit infront of the grass?

Any help you can offer would be very appreciated

Thanks!