Combine spices and brown sugar with tomato sauce, then rub over roast, and cook on low for 8-10 hours. Then shred
Preheat oven to 375 degrees
Take about 2 cups shredded beef, and combine with softened cream cheese (put in microwave for 15 seconds), salsa, and shredded cheddar cheese.
Put approximately 2 tbs of filling on each flour tortilla, and leave a little space on each end (3/4 inch), roll tight, and place on a cookie sheet, seam down.
Bake 11-13 minutes until brown and crispy.