diff --git a/README.md b/README.md
index e454ca7..db5d37a 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,8 @@ For Windows, click [here](https://slproweb.com/products/Win32OpenSSL.html) and c
 
 
 * Select the **telephone activation** method, then, run `umskt -i <Installation ID>` using the `Installation ID` the activation Wizard provides for you
+   * If you're activating a non-Windows product, use `umskt -i <Installation ID> -m <Product>`, where `<Product>` is one of `OFFICEXP`, `OFFICE2K3`, `OFFICE2K7`, or `PLUSDME`
+   * If activating Office 2003/2007, use `umskt -i <Installation ID> -m <Product> -p <Product ID>`
 
 #### 4. Profit!