Update README.md

README.md

@@ -6,4 +6,25 @@ Not all PowerShell Modules are published to the PowerShellGallery but are hosted
 [Read the blog post](https://dfinke.github.io/2016/Quickly-Install-PowerShell-Modules-from-GitHub/)
 
 ## In Action
-![image](https://github.com/dfinke/InstallModuleFromGitHub/blob/master/media/InstallFromGitHub.gif?raw=true)
+![image](https://github.com/dfinke/InstallModuleFromGitHub/blob/master/media/InstallFromGitHub.gif?raw=true)
+
+## Manual installation
+
+Download zip/tar or `git clone` repo to your disk. Open powershell admin console, navigate to installation directory. Launch `InstallModule.ps1`. Module is installed to `C:\Program Files\WindowsPowerShell\Modules`
+
+## Usage
+Import module:
+`Import-Module Install-ModuleFromGitHub`
+
+To install module from [username]/[reponame], branch master:
+`Install-ModuleFromGitHub -GitHubRepo [username]/[reponame]`
+
+To chose different branch
+`Install-ModuleFromGitHub -GitHubRepo [username]/[reponame] -branch testing`
+
+Use `-destinationPath` to select different installation path.
+
+Use `-SSOToken` to authenticate in private repositories. Default is anonymous authentication with access to public repositories.
+
+Use `-moduleName` to change module name. Default is repository name.
+