[ubuntu] Installing tarball files from the GUI

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http://ubuntuforums.org – Hello :) I just downloaded Komposer (WYSIWYG HTML editor) and I unzipped the file into a folder with the Archive Manager. I was wondering if there is a way using a program from the GUI to install tarball files, or the unzipped version of the archive. Does anyone know a way to install from apt-get the Komposer, or Bluegriffin software? Thanks (Hardware)