/cgl/ - Cosplay & EGL

I am sewing a skirt with horsehair braid for the first time. The thing is, It's a high low skirt so I'm putting a contrast color on the inside. How do I get the horsehair braid in between the 2 types of fabric? The only tutorial I've seen has you sew it on the outside of the fabric and then roll it in, but that wouldn't work in this case.
Any help is appreciated!