Originally Posted by GEMRM

You don't have to hand sew the opening you leave in the lining for turning - you can usually pull it to the outside of the purse, pinch a small seam in it and sew it together that way - it's so small it doesn't really show, and it's usually either in a side seam or bottom region - where no one but you would see it anyway.
Another way to do it is to pinch the seam together and then sew from the outside - kind of like a stitch in the ditch sort of thing.