Sure. It's super easy though, almost too simple to need a full tutorial. There are tote bag tutes and zipper pouch tutes already on the tute index and mine are nothing special. The tote bag is just like a pillowcase with straps. (although I did do french seams because it is unlined and the ripstop nylon likes to fray, so I wanted no raw edges showing)
1. Make the tote bag FIRST.
2. When the tote bag is done, fold it up as compact as it will go.
3. Lay the little folded bundle on a piece of paper, and trace a rectangle around it.
Add seam allowances, and that is your pouch template.
4. Then make your pouch.
here's a good tute for poucheshttp://www.craftster.org/forum/index.php?topic=22875.0
You do it in this order to make sure the tote bag will fit inside the pouch.
The only "new" step is that after you make the tote bag and the pouch, you attach them with a single line of stitching.
1. Turn the tote bag inside out.
2. turn the pouch inside out.
3. pin one side of the pouch to the top edge of the tote bag, in the center of the "back" side of the tote bag between the handles. (my tote bag has a back and front because of the appliques) Remember: You're pinning WRONG sides together because both of them are inside out.
4. The pouch top edge, where the zipper is, should be just below the hemmed top edge of the tote bag.
5. sew a line near the top edge of the pouch close to the zipper, sewing it to the top edge of the tote bag.
you only want to sew one side of the pouch to one side of the tote bag. Don't sew through both layers of the pouch or you will sew it shut.
anyway, that is all there is to it! The main thing is just to sew the wrong sides together so that the tote bag will fold up INSIDE the pouch and not outside it.
The other tip is to make your straps out of ripstop nylon too, (or whatever your lightweight fabric is). Sew it into an inch wide tube, turn it right side out and topstitch it. I usually like to use premade nylon belt webbing for straps but it is bulky and rigid, it won't fold up compactly so it doesn't work for this project. All the fabrics you use for the bag and the pouch should be thin and light, but strong. That is what keeps the whole thing so handy and pocket sized! A lightweight nylon raincoat from the thrift store is a good choice, then you even have the straps pre-made if it comes with a belt!