Welcome to the forum. You've had 14 posts (at the time of writing), so I feel you should know that you will get the best responses by making literate
posts. I know there are places where they appreciate 1337 and so on: this is not one of them. Consider: if you cannot be bothered even to use the shift key, why should we be bothered to help you?
If English is not your first language, then being careful to be literate is even more important. If it is not, you should realize that there are many here, very skilled and helpful, who will find your posts hopelessly incoherent. Your threads are supposed to hang about, so your problems and experiences can help others weeks, even years, later. If they cannot understand what you write, how are they to benefit? If you don't care if your writing helps anyone else, why should anyone else help you?
But what can really help, too, is if you edit your profile to show where you are from, as well as your distro. Help us to help you.
i found 2 major extensions .rpm OR .tar.gz
Double-click their icons.
.tar.gz is an archive like zip, called a "tarball", double-clicking it will open the archive in the "file roller" which is like winzip. The archive usually contains a plain text file called "README" or something similar. Read it, it has some instructions.
.rpm is a special archive used by the program "rpm" for "redhat packet manager". Double-clicking that will start the rpm program in graphical mode. It will attempt to install the program.
However, you should not be using these methods in general. Almost everything you want is in the menus under "add/remove programs". Have a look in there.
You should also look at the FAQ:
... and re-read my earlier replies in this thread. I explain the package management system in some detail.
can v somehow change the mode of windows s/w and use them in linux?
I'm not sure I understand this, but I think you are asking if you can somehow alter Windows programs to run in linux.
If so, then the answer is "yes". Altering a program to run on an OS it isn't designed for is called "porting". This usually requires access to the source code for the program, and the appropriate development tools. The second part is easy - fedora has them - the first part is hard as Windows programs are normally "closed source" programs. That is, the owner dosn't want to give you the source code.
However, it is possible to run some Windows programs via another program called "wine" (yum install wine). WINE = WINE Is Not an Emulator, implements the Windows API for Linux. However, installing software with WINE is usually more problematical than installing Linux software.
Fortunately, there is a Free Software alternative to almost all Windows programs. You are far far better using the linux software. Part of the point of Linux is that you no longer need to run restrictive software, after all.
So: what software would you like to install?