have to disagree redx113 .. xnews was made specifically for binary newsgroups. i've been using it for years. it is the most simple, yet ppowerful and robust binary newsreader that i have used. i hate complexity and feature bloat..which is what all the others are about.
the problem that buscuitboy is experiencing is likely a lack of RAM, when xnews (or any other binary newsreader) combines the threads of multipart binary posts...it takes a lot of memory. the good news is that it is temporary, then once they are threaded, memory demand drops to normal. also, you will get some spiking in RAM use when you are downloading because you are in actuality downloading individual messages which are being combined into binary files on your computer, which takes memory.
You learn more about binary newsgroups and downloading binaries from the usenet at:
which is a tutorial on using the binary newsgroups