A Whole New You (2004)

Derek, an office worker, goes about his work virtually unnoticed by his coworkers. Treated alternately as an annoying obstacle, or as completely invisible, Derek is on the verge of despair when he notices a self-help ad that promises to turn him into a "whole new you." Enthralled, Derek buys the program and follows its advice, and finally makes an indelible mark that no one will ever forget.