7-Zip is a free file archiver that runs on Windows and can open .tar.gz files. Download and install 7-Zip, and you will be able to open up your .tar.gz file.
If 7-Zip does not launch when you double-click the .tar.gz file, ensure that 7-Zip is set to handle these types of files by default.
Now go back and try to open your .tar.gz file. 7-Zip will start up and decompress the archive.
Then import the required files from the uncompressed folder into the outlook 7..