I booked my ticket for 3rd Jan 2010, from Chandrpura to NDLS, My Boarding is on Chandrapur but i want to boarding from Koderma Station . I am in out of station , how to change my boarding ? It is possible i can Change from any Railway Station ? Now i am in Delhi, i will go there 2rd Jan... My train no: 2817 and pnr 6433178872....