Cheat:
 With this cheat, you can multiply items for all your saved 
 games! It doesn't matter what charactor, what name, whatever.
 
 Lets say you put a great item on dungeon level 1, copy 
 the file: "Levels.1" to another directory, lets say: 
 "c:levels" and your nethack directory is "C:NetHack"
 Go back to level 1, pick it up. go down the stairs. 
 Copy levels.1 from "c:levels" to "C:NetHack"
 You can go back up the stairs to level 1, the level 
 will be in its exact state!
 
 This usually doesn't work on pets and monsters, they 
 can become frozen.
 
 I suggest using this cheat on gain level potions, gain 
 ability potions, and gain energy potions, and unique items. 
 Using this with a polymorph ring and a polymorph control 
 ring will turn you into anything you want! 
 If you turn into a female of the species, you can lay and 
 egg and get a strong pet by raising it! Personally, 
 I like green dragons.
 
 
 There IS a way to save your progress in the game...
 Say your name is John.
 
 Everytime you save the game a file called john.sav is put into your
 save directory.  Write a batch-file called save.bat:
 
 copy john.sav backup.sav
 
 Run it every time you save and quit the game.
 
 Then if you die you can start up at that point with the restore.bat
 file:
 
 copy backup.sav john.sav
 
 If you die a lot using this you may encounter your ghost as well!
 
 Save the game.  Run save.bat.  Restart Nethack.  Quit the game (not
 save).  The game will now tell you everything you are carrying and
 delete your save file.  But all you have to do is now run restore.bat
 and then run nethack again.  This is a good way to avoid wearing
 and/or using cursed items and to identify objects that you are
 carrying.