rar help...
Welcome to the community.
I'm a long-time Mac user.
First, I'd recommend you use this rar expander:
http://rarexpander.sourceforge.net/ It's made for Mac OSX. I've had flawless results with it. It is a freeware download.
Second, I'd recommend you get this "Split & Concat" joiner application:
http://www.macupdate.com/info.php/id/9545 It's also made for Mac OSX, and I've also had flawless results with it. The key here is that the downloaded segments must have two "." in each address and that they are sequential. when you read the simple instructions it will be clear. It is also a freeware download for which I've sent a modest paypal amount to the creator, and will send more in the future since it is such a beautiful application to use.
Third, I find I can play just about everything I download with VLC, Quicktime, and RealPlayer. If you don't have it already on OS 10.5, get "Flip4Mac" as a free download at
www.Apple.com. That will convert all of the .wmv movies to Quicktime.
Fourth, VLC is a very nice program, to make playback of your movies simple, I recommend the following. Open VLC/pull down the "File" menu/open "Quick Open File"/select your file you want to open/then hit the play button on the VLC viewer.
I hope this helps. Let us know.