TV Guide Network's new summer reality show, "Nail Files," which follows budding entrepreneur Katie Cazorla as she aspires to take her salon, The Painted Nail, to the next level. With the support of her fiancé, record producer Walter Afanasieff, Katie hosts gifting suites, attends A-list events, launches her Spring line of polishes, and handles her celebrity clients all while placating her trouble-making staff. Katie's life may seem glamorous, but keeping all the balls in…