[Dave]

Check the forumdisplay.php file around line 748.
There's a hook called "forumdisplay_sort", which should allow you to change the sort field.

Something like this should work for the hook:

PHP Code:

$sqlsortfield = 'solvedcolumn';
$sortfield = 'solvedcolumn';
$handled = true; 


Of course you have to add the logic to only sort it when your button is being pressed and such.