Well first, nice desktop
Now on to the areas you're having problems with....
The files you've mentioned basically break down into two types. tar.gz and tar.bz2 are kind of like the .zip files you're used to in Windows. You should be able to double click them, and they will open in the archive manager - the Ubuntu version of Winzip, if you like, although it's obviously more complicated than that
So just look for the options that look familiar, extract the files into your desktop or home directory (which you could think of as kind of like My Documents, but better IMHO) and then take it from there.
As for .run files, I don't know the technical details but I would probably describe them as part installer, part .exe, part batch file, but more sophisticated. The downside is they really need to be run from a command line. As Douglas Adams said though, Don't Panic! For your graphics card (nVidia, if I remember correctly?) you shouldn't need the command line. I'm afraid I can't find the link right now, but there is a guide out there that should get you up and running without having to resort the command line ("terminal" in Linux-speak
)
However.... If I can offer some advice. Take your time. Get used to the way Linux works, it's different to Windows and that will take a bit of getting of used to - you've already found this out with .tar.bz and so on. Do a bit of reading, if you're wondering about a file format then just Google it, there's loads of information out there. Have a good look around the Ubuntu forums (link in my previous post), just have a read - there's no rush. Remember, it's very unlikely the first thing you did in Windows was install a graphics card
Guess what I'm trying to say is don't run before you can walk - it took me at least a year before I was happy to completely delete my Windows partition. You've probably been used to using Windows for a
long time and things are a little different in Linux land. Not massively, just... different. I'll gladly help out where I can but I am
not by any means an expert, just a happy Linux user who wants to spread the word
PS, sorry, Wine... assuming you've got it installed rather than just downloaded (if you're not sure, press Alt-F2 which brings up a "run" dialog, then type "wine notepad" - if it's installed then after a few seconds the familiar Notepad should run) then type "wine" followed by the path to your .exe file. It may or may not work, and here once more I run out of technical knowledge. Once again I'd refer you to the Ubuntu forums, but also to
WineHQ
OK, I'm rambling now. Maybe I should try to put together some sort of beginners guide with a bit of structure. Now that's a thought....