NextGen???

Thanks for your question. NextGen Gallery is quite popular, and this comes up from time to time, as in this earlier topic:

MLA with NextGEN Gallery

NextGen has its own approach to galleries, taxonomies and image storage which is quite different from the WordPress standards. MLA is designed to be “WordPress like”; there is no way to combine NextGen and MLA.

I regret that the news is not better, but I am marking this topic resolved simply because the question has been answered. Thanks for your understanding and for your interest in Media Library Assistant. I hope it will prove useful in your application.