In response to your question about how to install tar and tgz formats, some of them have some unique program to run such as the one you must mentioned in the install guide text file that came with that package. Most of them that ships the source will can be installed by running the configure script, the make utility, and the "make install" option.
After opening the package you will going the appropriate subdirectory created and run "./configure". Then you'll run "make", then you'd run "make install". There will be some Readme and other guide steps to assist you in customizing it and running the binaries.
I don't always run Linux in the GUI mode, but I believe you would locate the binary and manually add it to your desktop or GUI menu.
Finally, you can check the directory where you told the program to install the package for a binary file to run. If you run the program the say way you ran the install script (by typing in the name, "./filename") that should be an immediate start.
-- L. James
L. D. James