I am using menu from www.dnn360.net too for my intranet,
Using navigation suite isn't hard, if you need to using 2 menus as skinobject you can insert menu definitions 2 times:
<dnn:DNN360Menu runat="server" id="TabbedMenu" ConfigFile="tabbed.xml"/>
<dnn:DNN360Menu runat="server" id="VertMenu" ConfigFile="vertical.xml"/>
ofcouse you must have 2 copy tabbed.xml and vertical.xml which are the settings file.
If you want 2 menus display differently, you can choose different root for the vertical one, or you can use exclude-tabs to tell the menu which items should not displayed
<?xml version="1.0" encoding="utf-8" ?>
<Settings>
<Setting name="style" value="HorizonTab1_hover"></Setting>
<Setting name="UseTabTitle" value="False"></Setting>
<Setting name="DisRegardHiddenFlag" value="True"></Setting>
<Setting name="StartLevel" value="0"></Setting>
<Setting name="Scope" value="-1"></Setting>
<Setting name="Hideoutofscope" value="False"></Setting>
<Setting name="MaxLevel" value="3"></Setting>
<Setting name="NoAdmin" value="False"></Setting>
<Setting name="Width" value="100%"></Setting>
<Setting name="ExpandAll" value="False"></Setting>
<Setting name="Deep" value="3"></Setting>
<Setting name="excludetabs" value=";7;85;108;"></Setting> ////// 7;85,108 is TabID that you don't want to show in a menu.
</Settings>