Sorry, but I think you have not understood my problem. I'm not asking how to make a large slideshow!
I speak of individual photos that illustrate articles or pages: I put several pictures spread to several parts of the page. You will understand with a link:http://www.mon-coin-de-bourgogne.fr/visites-touristiques/brancion/
On this page, the first picture is inserted with this code:%% WPPA%% %%photo = 40%% %% size = 400%%
The other pictures are stored somewhere other than WordPress, but later, they will be inserted with WPPA.
I want that clicking on the first photo (or any picture inserted with the code WPPA%% ), a pop-up window opens like a lignhtbox to scroll through the pictures on the current page, but more large. And clicking "close", it returns on the page.
I hope that you understand what I want ... but perhaps that's not possible with WPPA!