I know what you mean about language. When you say "task bar", I understand that as the area on the panel that lists the current programs in the current workspace! What you want is a launcher icon on the panel!
Zorin Lite is using the LXDE desktop, which I find one of the most confusing to configure. This seems to do what you want (I can't check it still works, as I don't have LXDE)
http://www.ipernity.com/blog/67098/278902
Linux being versatile, you can put also an icon on the desktop
http://wiki.lxde.org/en/How_to_make_...on_the_desktop
Or you can do what I do, and have a keyboard shortcut (use the Super key, which you'll know as the Windows key): for my file browser I use Super-f and Super-h to go straight to /home
http://wiki.lxde.org/en/LXShortCut