How to easily create dependent Picklist(Option Set) in CRM 2011 ?

hi all,

Refer the following links

http://ashwaniashwin.wordpress.com/2014/04/03/dependent-picklist-optionset-in-crm-2013/

http://blogs.msdn.com/b/paf/archive/2011/04/21/how-to-easily-create-dependent-picklist-in-crm-2011.aspx

http://blogs.msdn.com/b/paf/archive/2011/09/29/dependent-picklist-recurrent-problems.aspx 

http://msdn.microsoft.com/en-us/library/gg594433.aspx

CRM 2011 TreeView for Dependent Picklist

http://treeviewfordependent.codeplex.com/