Hi thejss
By "update himself" are you referring to update the site using InBrowser Editing?
InBrowser Editing allows a user to update/replace images in an existing gallery. A improvement we've been asked for and considering is the ability to add/remove images from a gallery.
A workaround would be to create a larger gallery, by repeating the existing pictures or adding a placeholder picture, and your customer will be able to upload new images instead of those extra ones. It's not elegant but it might be a feasible workaround.
What it also sounds is that you want to allow your client to add new "projects" ?
We're considering a range of features that will allow you to design a site allowing that, and InBrowser Editing to allow editing such a site - but currently the ground work is in progress and we're on our way there.
So stay tuned for update along these lines in the next months.
Hope this helps.
Thanks,
Calin