I got it working using this :
[gallery type='picasa' user_id='*****' kind='photo' album='portails' max_results='50' slideshow_height='500' columns='4' thumbnail_width='300' thumbnail_height='300' ]
misunderstood was kind album is for displaying collections of albums and kind photo is to display one album, I though photo was for a collection of photos_id taken from anywhere : so don’t put album-name when u use kind album !
Even albums collections works !
One more thing, whatever the size I choose, it will display small tiny 75px pics then again, whait is the purpose of having thumbnail_width, thumbnail_height and thumbnail_size, I guess the 2 first must not be used with the latest !? Anyway I can’t get my thumbnails resized !
A tiny lack of docs…hum hum but your pluginSSS are so awesome that I have to shut up my f@^\`|[{ mouth and go to hell !