Decompression problem with the Zipped files

Hello everyone,

Small technical issue and I can not solve alone:
I want to unpack an ISO file. I use Winrar (but I tried other similar software and it has not changed.)

At the end of decompression, the file must be "unzipped" and the icon of the latter must match a CD ISO (green).
Outside it is not, it creates me a file but another file of the same name and still compress. So I can not get it and burn it to DVD.

I made all possible manipulations on my PC and on but nothing else does and the result is always the same.

As against one of my buddy that made the same with the same file (compressed) on your PC and it it works!! I do not understand anything.

I'm Windows XP Pro but it is the same as family.

Thank you for your help in advance.

ISO what then? Can you be little More elaborative,about your question.

Actually I did not specified, oops.
I made a backup of my Wii games to save. As it is a little over 4 GB, I have compressed to keep on my hard drive at a lower spot. It is in several pieces. But once I want to unpack burned to a DVD, it is impossible. Winrar me recreates another compressed file, which by this time against the entire size. But this is not an ISO file that I can burn a DVD.
Thank you.

Destination disk to FAT32 or NTFS?
If you try to remake the iso from the original DVD, so u required a password?