Once I cut the pocket out, I stitched up the edges to just leave enough of the opening to sew in place on either side inside the zipper.
Step 1: Sewing in the Pocket Pouch
I only opened the zipper back up to show the first side of the stitching better. When you go to sew the other side, be sure to stitch up the button hole area to reinforce it. After you have inserted and stitched that pocket in place, be sure to check for any holes. I found one little one to sew shut to be sure nothing will be falling out of that zipper pocket when in use.
The last photo shows inside the zipper pocket.
Step 2: Finish Sewing Up Seams
Other then sewing on that additional pocket, this purse takes no time at all to make. The purse has two pockets on the outside to slip things in, and if you didn't care about the zipper pocket, you could choose to stitch up the top and only use the zipper to access the inside of the purse.
You may want to add any kind of photos or art for fun or to give the purse a particular theme.
Have fun creating!