How to override sorting answer code

Question

How to modify this code via plugin?

 

if (qa_opt('sort_answers_by')=='votes') {

foreach ($answers as $answerid => $answer)

$answers[$answerid]['sortvotes']=$answer['downvotes']-$answer['upvotes'];

 

qa_sort_by($answers, 'sortvotes', 'created');

 

} else

qa_sort_by($answers, 'created');

 

Also how to call more than one answer list with different sorting like by created and by votes to gether.