You have to point to SERP while you invoke search function in template file, by using 'slug'=>'your_SERP_slug' parameter.
The template file you choose for your SERP page doesn't matter, as long as you do not call searchresult function in template's code, instead of embedding it in page's content (using short tags).
The template file you choose for your SERP page doesn't matter, as long as you do not call searchresult function in template's code, instead of embedding it in page's content (using short tags).
Addons: blue business theme, Online Visitors, Notepad