quickportfolio - jquery conflict and center images

yes i have already tried (in my first post i put the same link), but i receive " Uncaught TypeError: Cannot read property 'prototype' of undefined", and the images are not loaded. I have also tried to download the last version of isotope library (2.0) and to load this library as the first one in your module (in mod_quickportfolio.php), all attempts that I have been suggested by googling. Now, the piece of code that i added to script.js is there if you want to see it.
Cla

Hi
i've worked on the code on saturday morning, doing various attempts. However, none of them worked, and since I have to go online in a few days I had to stop trying. The module now is still installed but not published, I had to found something else that suited my case.Thanks anyway!
Claudia