Modify the property details template

Hello...

I need to customize completely the property details page according to my customer requierements, so I need to make a different layout.

I have seen that the PHP file that renders the layout is com_osproperty/classes/listing.html.php, At the moment, to do what I need is to modify directly that file, which is bad, because I would be hacking the osproperty core files. The ideal way is to be able to add a file to my templates folder and make the modifications there, as I do with all other Joomla components.

What is the best way to customize osproperty details page?

Thanks

Jaime