Umm.. try looking at skin1/customer/search.tpl.
Note that it has some "search" parameters and then at the bottom of the code (after the button) it has
Code:
<a href="search.php"><u>{$lng.lbl_advanced_search}</u></a>
try changing "search.php" to "mysearch.php" but I would add our friendly little
Code:
echo "hello there";
to mysearch.php so that it has something (anything) to display and go from there.