Thanks for the replies and links..
I've downloaded both URL Snooper and Flashget. URL Snooper is working fine, I've found the URLs for the files, but when I add them to flashget they don't download, I can see them in the list, but they don't make any progress....... any idea why this could be? I have a username and password to login to the site I'm trying to get them from.... when I input this into the relevant bit of flashget though nothing happens......?