SUSSEX COUNTY-The New Image Body Center in Sparta is offering 3 1/2 months of private pilates reformer sessions to the winner of a "New Image" contest for females whose New Year's resolution is to live a healthier and more fit lifestyle. Upon completion of this intensive program, the winner will receive a day of beauty including a "full body makeover," personal training sessions, and unlimited group fitness classes. To complete the makeover, the winner will also receive personal training sessions from Health & Body in Sparta, a haircut and blow dry from KC Hair Salon in Sparta, a manicure, pedicure, and facial compliments from A little Off the Top in Newton, and a bouquet of flowers from The Flower Box in Sparta. Applicants must enclose a full-length photo and letter stating why they believe they should be chosen to win the makeover. The winner will be announced on Valentine's Day, with workout sessions beginning immediately through Memorial Day weekend. All letters must be postmarked no later than Feb. 7. All applicants must be at least 18 and serious about making a commitment toward a fitness program. Applicants should send a full-length photo of themselves and letter to New Image Body Center, 13A Main St., Sparta, NJ 07871. For more information, call 729-2002.