Access web page with alternate tab displayed by default

I need a way to open the same WebHelp project with the Contents tab displayed by default if the project is accessed through one method or with the Search tab displayed by default if the project is accessed through another method. I am using RoboHelp X5.0.2.

Peter, I generated my project with the Search tab set as default. I viewed the start page, and the Search tab was correctly displayed by default. I made a copy of this start page and saved it to a different folder location. I regenerated my project with the Contents tab set as the default. I copied the alternate start page into the project so that I essentially had a start_contents.htm page and a start_search.htm page. This method was ineffective. Both the start_contents.htm page and the start_search.htm page now open with the Contents tab displayed by default.

Is there a way through the URL to be able to specify the tab to display by default (sometimes the Contents tab and sometimes the Search tab) for the same help project, either through using multiple start pages (which in my test appears to be ineffective) or through additional code in the URL itself?