Most of the Common System Icons are found in the following 2 .DLL files:
- C:\Windows\System32\imageres.dll
- C:\Windows\System32\shell32.dll
Here's how to get all of the Icons from your computer into one folder, to help you in customizing Classic Shell & Classic Explorer:
- Download Resources Extract, from Nirsoft here: Resources Extract
-  Run the File
-  Where it says "Filename/Wildcard" put in any location on your computer, and select any .dll, .exe. .cpl or .ocx file, and click Open
-  Delete the Name (but leave the extension, and put a ' * ' instead, like this:- instead of C:\Windows\System32\explorer.exe
-  change it to C:\Windows\System32\*.exe
 
- Select a Destination Folder on your hard Drive, such as E:\Icons\Extracted Icons.. it could easily be over 500 MB, or even a GB or more, depending on whats on your system
-  Select "Icons" in the "Resource Types to Extract", and deselect all the rest
-  Select "Scan Subfolders"
-  in "Subfolders Depth", select "unlimited"
-  Select "Automatically Open destination folder"
-  in "If filename already exists", select "Overwrite Existing File"
-  in "Multiple Files Mode", select "Extract all files into one folder"
-  Click Start, and wait for it to finish
- its a good idea to run the scan a few times, and scan different parent directories for at least both EXE & DLL files, (and .CPL & .OCX are useful too) such as:-  C:\*.exe
-  C:\*.dll
-  C:\*.cpl
-  C:\*.ocx
-  D:\*.exe
-  D:\*.dll
-  D:\*.cpl
-  D:\*.ocx
-  E:\*.exe
-  E:\*.dll
-  E:\*.cpl
-  E:\*.ocx
-  etc
-  always saving to the same folder
 
**You can run multiple instances of the program, so you can search several locations at the same time and add them all to the same folder
it might take a long time, and theres alot of Icons... so depending on your needs, you may just want to scan folders you know you need something from, such as:
-  D:\Program Files\*.exe
 
-  D:\Program Files\*.dll
-  D:\Program Files\*.cpl
-  D:\Program Files\*.ocx
-  D:\Program Files (x86)\*.exe
-  D:\Program Files (x86)\*.dll
-  D:\Program Files (x86)\*.cpl
-  D:\Program Files (x86)\*.ocx
-  C:\Windows\System32\*.exe
-  C:\Windows\System32\*.dll
-  C:\Windows\System32\*.cpl
-  C:\Windows\System32\*.ocx
-  etc
**Click on "Save Config" & save it in the same directory as the program, to keep this search criteria easy to load