Got it guys.
Well, it was a matter of how to use the software.
First, thanks to Sandra, and Lobo that who suuggested that idea, or part of it, before.
In fact, The problem was that, when I open "WinIso" or "UltraIso", I used to go to the menu bar and take the "File" tab. Then, "New" or "Open". Importing the wanted file didn't work.
What should be done now is:
Instead of going to the "File" tab, we must go to the next one, "Actions". Then "Add Files". Choose the files, and then go back to the first tab "File", and
save them somewhere. They'll become an "ISO Image File".
If we like to convert them into Bin/Cue, we can go to the "Convert" tab.
It's important to mention here that we can add any kind of data as different elements to make that image.
Sandra, I have the same version of "Nero 6.3 Ultra Edition" which you've mentioned. It doesn't work with me. I don't know how it worked with you.
P.S. If someone knows another way to make an "Image File" by using other softwares, it'll be welcome adding it here. Thanks...