I have the following WebPart in my Master Page (aspx) layout.

I am trying to set the CombineWithDefaultCulture property dynamically - I have tried using Custom macros, macro resolver (API ) and the below approach (public function in code behind of the Master page) as well as trying to hook into the Webpart Init, Load and PreRender event handlers - nothing works.

Short of Cloning the web part(s) is there any way of doing this?

Note that the macro works when the same Webpart is added via portal pages.

<cms:listmenu runat="server" ID="wMenu" Path="/%" ClassNames="TNZ.ContentPage" MaxRelativeLevel="2"
WhereCondition="MenuItemGroup <> 'footer' OR MenuItemGroup IS NULL" RenderCssClasses="True"
ItemIdPrefix="tm" HideControlForZeroRows="False" ZeroRowsText="There are no menu pages."
CacheDependencies="##DEFAULT##" CombineWithDefaultCulture='<%# ValidationHelper.GetBoolean(CheckCulture(), false) %>' />