diff --git a/README.md b/README.md
index 73113ef..54f8798 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,8 @@ Download any website from the Internet Archive Wayback Machine.
 
 ## Installation
 
-You need to install Ruby on your system (>= 1.9.2) - if you don't already have it, then run:
+You need to install Ruby on your system (>= 1.9.2) - if you don't already have it. 
+Then run (you may need sudo):
 
     gem install wayback_machine_downloader
 
@@ -22,7 +23,8 @@ It will download the last version of every file present on Wayback Machine to `w
 
 ### Optional Timestamp
 
-You may want to supply a specific timestamp to lock your backup to an older version of the website. Wayback Machine Downloader will then fetch only file versions on or prior to the timestamp specified:
+You may want to supply a specific timestamp to lock your backup to an older version of the website, which can be found using the Wayback link: http://web.archive.org/web/**20060716231334**/http://example.com 
+Wayback Machine Downloader will then fetch only file versions on or prior to the timestamp specified:
 
     wayback_machine_downloader http://example.com --timestamp 20060716231334