FAQ / Can I upload via FTP Mass Upload, using Internet Explorer?

You could... But we really wouldn't recommend it. IE has the bad habbit of not disconnecting from server once you are done, so this might limit your access if you try to connect after.
You could use FileZilla, a free and easy to use client. Or, if you are using Firefox for your Internet experience, there's this nice extension called FireFTP, which will open an FTP client in a tab.