Now that is an impressive gallery system, i'd love to use something like that myself, i'd even be prepared to pay for it
however, for us cheap gits you have
4images Gallery. It's free, very powerful and easy to use and by using a hack found
here you can set it to use the vB user auth system.
The only downside is that while it is very powerful, it's not perfect (you get what you pay for basicly) and it uses its own template system meaning extra work for you if you want it to look like the rest of your site.
There are some other free gallery scripts floating about, but I recomend this one