No chance mate since Tata Sky Thompson do not have a diseqc option and DD Direct+ is on INSAT 4B (93.5 E) and Tata Sky broadcasts from INSAT 4A (83.0 E). There is no option of also adding any transponders or channels manually on the receiver this is ofcourse done by use of controlled software by Tata Sky to protect content. Well also the encryption company is their own i.e. NDS or Videoguard !
Get an FTA Receiver to watch DD Direct+ or Dish TV is also another option since the satellite used by Dish TV is NSS 6 (95.0 E) very close to INSAT 4B and you get it on the same dish is you make proper alignment !