I've done a little reading and things have changed a lot since I last used usenet. I had a software called FreAgent which is now just called Agent because it is no longer free and my ISP provided an nntp server. There was no such thing as nzb files either. If you wanted to grab a multi-part file you had to download each part separately, combine the pieces and then un-compress the combined file. And there were no good nntp search tools either, you had to search things out manually.
I guess that I'll have to learn all over again.