If you want to completely replace it, then remove lines 57-93 from that file , and enable line 96 to display the ajax search pro bar instead. I have place instructions for you there.
I've also made a modified version of the file for you, named page-slider2-asp.php. So if you want, you can simply rename the page-slider2.php file to page-slider2-original.php, and the page-slider2-asp2.php to page-slider2.php.Best,
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