If every time you walk into a fedex kinkos's, the customer service reminds you of Dave Chappelle's Popcopy commercial (where, if we remember, a salesman knocked someone out), be warned: The megachain is pretty much all there is for 24-hour Xeroxing. Besides a Copy Cop in Back Bay (815 Boylston St., Boston. | MBTA: Green Line to Prudential), head to the following locations for your last-minute needs: Copley (187 Dartmouth St. | MBTA: Green Line to Copley); Government Center (2 Center Plaza. | MBTA: Green Line to Gov't Center) or Chestnut Hill (1244 Boylston St., MBTA: Green D Line to Chestnut Hill). Five reasons to get the Digital Silver package when subscribing to Comcast, even though it's, like, $78 a month: "Double Dare" reruns on Nickelodeon Games and Sports; edgy documentaries such as "The Staircase" on Sundance and the Independent Film Channel; G4 - all video games, all the time; poker; poker; poker; more poker; something called "Foody Call" on the Style Network - we don't know what it is, but we like it; WE and Lifetime; and, finally, the "Smooth R&B" digital radio channel (for the ladies). For more info, go to www.comcast.com or call (800) Comcast.  See more service listings