OK Fine!
 

Oh yeah now I remember I do have the original thief 2 game but I lent to to a far away friend;) How do I play the backup copy? I tried using DAEMON tool but that did not work. Please help.

Install it and USe the Crack from HEre at GameCopyWorld http://www.spacetarget.com/gcw/games/pc_thief2.shtml