Generally you would install the WCF LOB ADAPTER PACK 2.0; the full version is downloadbale from MSDN, you will need a license for that, I believe.
To use that you will also need to install the LOB ADAPTER SDK, details (and link) in the readme.
Hoever, I do believe the standalone version you found is the same thing, as suggested by the taxt “This SQL adapter which is also a part of the BizTalk Adapter Pack 2.0″ on http://www.microsoft.com/downloads/details.aspx?FamilyID=CEB0BB34-F9D2-4D14-8BBE-0311D227B091&displaylang=en