how to install AJAX Control Toolkit

I went on to the http://www.codeplex.com/AtlasControlToolkit/Release/ProjectReleases.aspx?ReleaseId=1425 downloaded the toolkit, but no idea how to installed.

this is the place where i found the solution, hope it can help you too http://ajax.asp.net/ajaxtoolkit/Walkthrough/Setup.aspx