No need for a computer; many users implement these scripts directly via their receiver's file manager or terminal.
Unzip the contents to find the updater script or plugin files. rangopolishchannelsupdater.zip
Fetch the latest version from a trusted source, such as the PKTeam Channel List directory. No need for a computer; many users implement
Use an FTP client (like FileZilla) to move the files to your receiver (usually to the /tmp/ or /usr/lib/enigma2/python/Plugins/ directory, depending on the file type). No need for a computer