Install BOL (February 2007)

I have BOL (May 2006) in my system, do I need to remove to install BOL (February 2007)? Is the BOL cummulative?No need to as the BOL update is cumulative, http://sqlserver-qa.net/blogs/sqltools/archive/2007/02/24/bol-a-lower-version-of-this-product-has-been-detected.aspx|||Thanks for the quick reply. I'll try this one.