Yes you can use any download manager, and we do recommend this to all our slow connection users. Using a download manager will make it possible to resume a "Broken" download, and you can also pause a download. There are a few things you need to pay attention to though:
1: You need to configure your download manager so it doesn't "Hammer" our server, this will block your IP address for a while. You can read the download manager manual for instructions.
2: Since our movies are located behind a password protected area, you will need to enter you login info (Username and Password) in the setup section of your download manager to make it possible to download anything.