He'll be in a wheelchair during the inauguration. From CNN:
Vice President Dick Cheney will be in a wheelchair during Tuesday's Presidential Inauguration, after pulling a muscle in his back while moving, White House spokeswoman Dana Perino said
"Under his physician's recommendation, the Vice President will be in a wheelchair for the next couple of days, including for tomorrow's inauguration, The Vice President is looking forward to being there for tomorrow's historic inaugural activities," Perino said in a statement.