After installing the menu module, edit your skin file using one of the following methods. For old-style SolPart menus:

• Replace
  <%@ Register TagPrefix="dnn" TagName="..." src="~/Admin/Skins/SolPartMenu.ascx" %>
  with
  <%@ Register TagPrefix="dnn" TagName="..." src="~/DesktopModules/DDRMenu/SolPartMenu.ascx" %>

For newer SolPart menus that use the <dnn:nav> syntax:

• If it's not already there, add
  <%@ Register TagPrefix="dnn" Namespace="DotNetNuke.UI.Skins" Assembly="DotNetNuke" %>
  to the list of Register tags at the start of the skin (this enables custom attributes for the dnn:nav control).
• Replace
  <dnn:nav providername="SolpartMenuNavigationProvider" ...></dnn:nav>
  with
  <dnn:nav providername="DDRMenuNavigationProvider" ...>

  <CustomAttributes><dnn:CustomAttribute Name="MenuStyle" Value="SolPart"/></CustomAttributes>

  </dnn:nav>