Manually change filetype icons in Windows 7
You can use File Type Manager - check this link from www.howtogeek.com for a step-by-step procedure.
Or you can choose the hard way to change the registry (not recommended though): How to Change the Icon for a File Type in Windows 7 and Vista
Please see the bottom section labeled "UPDATE". I left the top half to preserve the information.
I believe ths is the page you are looking for. Below is quoted information from that page. Microsoft did move a lot of stuff around in Windows 7 compared to XP, so for the exact part of the window where you are finding registered file types, this will do.
To find the registered file types on a computer running Windows Vista or Windows 7
Click Start. Open Control Panel, click Control Panel Home in Windows Vista, and click Programs.
Click Default Programs, and click Associate a file type or protocol with a program.
On this screen, the registered file types are displayed.
For more information about how to change the file types, files, and folders that are migrated when you specify the MigUser.xml file, see Using USMT.
Below is a screenshot of the window.
UPDATE
It seems that the first part did not work. Here is a way that is supposed to work. I did not test it, I just read a lot about it. This page showed a couple ways of completing the desired task. Both ways unfortunately require purchasing a program.
- File Extension Icon - Change Default Icon
- Icon Packager
You might be able to download the free trial and change only what you want and uninstall the program. Hopefully that would cause the changes to be permanent due to the program making registry changes.
Please note that I am only trying to name easy ways.
FileTypesMan is free and helps you change the icons easily:
- Select the extension
- Press F2 to edit the type
- Browse to a .exe or .dll file to select an icon