diff --git a/src/modules/previewpane/README.md b/src/modules/previewpane/README.md
index 86beebb93d..b787fd9c5c 100644
--- a/src/modules/previewpane/README.md
+++ b/src/modules/previewpane/README.md
@@ -83,7 +83,7 @@ FileExplorerPreviewSettings(
 
 ## Installation
 
-### MSI
+### MSI (Recommended)
 
 To add a new Previewer update the `Product.wxs` file in `PowerToysSetup` similar to existing Previewer to register the Preview Handler. More details about registration of Preview Handlers can be [found here.](https://docs.microsoft.com/en-us/windows/win32/shell/how-to-register-a-preview-handler)
 
@@ -123,6 +123,38 @@ To add a new Previewer update the `Product.wxs` file in `PowerToysSetup` similar
       </Component>
 ```
 
+### Directly registering/unregistering DLL's
+**[Important] This method of registering Preview Handler DLL's is not recommended. It could lead to registry corruption.**
+#### Registering Preview Handler
+1. Restart Visual studio as administrator. 
+2. Sign `XYZPreviewHandler` and it's dependencies. To sign an assembly in VS, follow steps given [here](https://docs.microsoft.com/en-us/dotnet/standard/assembly/sign-strong-name#create-and-sign-an-assembly-with-a-strong-name-by-using-visual-studio).
+3. Build `XYZPreviewHandler` project.
+4. Open developer command prompt from `Tools > Command Line > Developer Command Prompt`.
+5. Run following command for each nuget and project dependency to add them to Global Assembly Cache(GAC). 
+```
+gacutil -i <path to dependency>
+```
+6. Run following commands to register preview handler.
+```
+cd C:\Windows\Microsoft.NET\Framework64\4.0.x.x
+gacutil -i <path to XYZPreviewHandler.dll>
+RegAsm.exe /codebase <path to XYZPreviewHandler.dll>
+```
+7. Restart Windows Explorer process.
+
+#### Unregistering Preview Handler
+1. Run following commands in elevated developer command prompt to unregister preview handler. 
+```
+cd C:\Windows\Microsoft.NET\Framework64\4.0.x.x
+RegAsm.exe /unregister <path to XYZPreviewHandler.dll>
+gacutil -u XYZPreviewHandler
+```
+
+## Debugging
+Since in-process preview handlers run under a surrogate hosting process (prevhost.exe by default), to debug a preview handler, you need to attach the debugger to the host process. 
+1. Click on a file with registered extension to start host process.
+2. Attach debugger in Visual studio from `Debug->Attach to Process` and select `prevhost.exe` with type `Managed(version), x64`.
+
 ## Managing Preview Handlers
 
 After successful integration, your preview handler should appear in the PowerToys settings UI under the `File Explorer Preview` Tab. In here you should be able to enable and disable your preview handler.