tossup between that^ and the quoted one below:
Dont be dumb dude....
How to install Return to Blockland for DUMMIES!:
Download Internet Explorer 8 or Open it up Now or you will pay
Type in Return to blockland On http://www.google.com/
Now use a MOUSE and click download
click save as Than |My Documents/Blockland/Addons|
Make sure the COMPRESSED folder is called System_Returntoblockland