Do you still have the papers in it? You do have to remove the papers before creating the quilt sandwich.
The techniques for layering the quilt sandwich are the same as for other quilts. I prefer 100% cotton batting for my quilts (Mountain Mist Blue Ribbon) because it seems to get softer in every wash; however, this is a personal choice. Batting choices also depend a lot on how closely you plan to quilt, whether you plan to hand quilt or machine quilt, or whether you want to tie. How big is your quilt top? You might prefer a different batting for a wall hanging than you would for a quilt that will be used on a bed.
I prefer spray basting to create the quilt sandwich. If you do a search on spray basting, you will find threads that explain how to do it. Other methods of basting include pinning, hand basting with thread, tacking, and machine basting with dissolving thread.