Well we learn something new every day hey
Normally Winrar will keep going forever, at a certain point you might see that it starts to count down before starting, that's all. Glad you like it! There is also many other "Radio" mods coming from other guys here, check out
http://www.subsim.com/radioroom/showthread.php?t=108915 by nvdrifter
and
http://www.subsim.com/radioroom/showthread.php?t=108950 by tedhealy
and I am sure there will be more to come.
Enjoy and happy hunting.