Don't be afraid of sewing in a zipper. One of the easiest methods is putting one in the center of the seam. Sew around the zipper sides, remove the seam stitches, and voila! A working zipper. Watch this video for a demonstration.
Centered Zipper
Tag: center zipper
Skirt Zipper
Learn a quick and easy technique for putting in a zipper in a skirt.