Okay for starters, in your posts try and separate your thoughts into paragraphs so it's easier for someone else to read. Even numbered bullets would help explain what it is you need to know. So if I miss something it's b/c my eyes got lost in the jumble of words in your post. Here goes nothing.
tar is a utility used to put a bunch of files/directories together into a single file. It does NOT do any compression.
In steps gz. With Gzip we add compression, much like winzip in windows. So foo.tar.gz could have thousands of files & directories in it compressed.
If you find foo.tar then it's uncompressed but packaged together so it's easier to transport.
This is much like a Windows's EXE format. Well it's ONE of Linux's attempts at making package installation easier. The reason your browser tried to PLAY that rpm file is because Real Audio network
has a playable format with .rpm extension. This can be fixed by removing the real audio plugin from Firefox's plugin directory. We can address that later if you want.
This is Fedora's way of installing applications from the commandline. You can similarly install yumex and then have a nice GUI for using yum. So from commandline as ROOT user you could type "yum install yumex" and then you'd find the shortcut to it in KMenu->System->Yumex I believe.
When you install the flash player plugin in linux it installs it on your system. It does not put a copy of the plugin into your firefox plugin directory. This is why it is not working. If you ever have a question as to what plugins you have installed for firefox, in the address bar type "about
: plugins" without the quotes and without a space after about
:. I had to throw a space in there b/c these forums will take the colon and letter p and turn it into a smiley as in ->
I'll explain how to install the flash plugin in a separate post, this is just for educational purposes.