First things first.

Dir is an abbreviation for directory. I suppose you meant Dear?

Ok Dear,

If you dont know the Samsung remote code then your chances of developing one out of AT89c2051 is also remote.

Anyway apart from Googling or Yahooing for the information on the net, you can do this also :

Elektor had once published a general purpose IR reciever that can be used for checking out if a remote control has survived the throw at your kid / wife/ husband etc. Try to build that and using your working remote, try to figure out the pulses ( from the reciever.)

Raghu