Use Newsleecher, best grabber ATM. VERY easy to use, multiple simultanious connections and support for everything, including the very handy *.NZB's (not including Newspro, the grabber for the super experienced. The amount of options in that one will make you crazy)
It isn't freeware though, you can use it for 30 days. (usually, there's a new version after 30 days so no real harm done) and if you're willing to spend that much a month for a payserver, 35 bucks for a very good program won't kill you either