I saw several different techniques for creating the embossed frame with the Framelits, but the one that worked best for me came from Angie Juda. Here's a photo showing the Big Shot "sandwich" that I used to emboss the frame. The most important thing is to make sure the cutting edge (the raised edge along the inside of the framelit) is face UP so that it doesn't cut the cardstock.
Stampin' Up! Supplies: Vintage Vogue, Pretty in Pink ink, Certainly Celery ink & cardstock, So Saffron cardstock, Whisper White cardstock, Jet Black Staz-On Ink, Subtles Patterns Designer Paper, Boho Blossoms Punch, Labels Collection Framelits, Silicone Rubber Pad, Pearl Jewel Accents, Stampin' Dimensionals