Here is an overview about the different templates in Delphi (3) and where they are stored.
Important: If you reinstall or update Delphi, you should save these files first!
delphi32.dci
Delphi 3 source file templates in a text file
delphi32.dct
Delphi Component Template IDE
binary file with the Delphi 3 componens templates
delphi32.dmt
Delphi Menu Template IDE / Menu designer
binary file with the menu templates
delphi32.dro
Delphi Repository Options ID
text file with the object repository's settings