Improving a WordPress website

Hello,

We are looking for solutions about different problems on our WordPress website.
If you know how to resolve it please answer.

1) publishing the English logo : http://www.arcticaventure.com/en/
problem: the Wordpress menu just accept one logo
2) translating the diaporama: http://www.arcticaventure.com/en/
3) teaching how to download new pics. For example, small pics on this page:
http://www.arcticaventure.com/en/snowmobile-holidays-in-quebec/
problem: we can't download new pics in our galleries