I'm not certain about undeleting as a word, but I'm certain that it is good as a concept.

     Most of the time when you delete a program from your handheld a copy is sent to your archive. To get to your archive go to your harddrive (usually C:) C:\programs\(Palm Desktop or Sony Handheld or Visor Desktop as the case may be) In this folder you should see a folder with your hotsync name on it. Open that folder and you should see:



Open the archive folder and you will see lots of prc files. Find the file you deleted and double click on it. Your should see:



Click on done and the next time you hotsync your file will be restored.