Go to the properties of one package, go to the "Open With" tab, and choose "GDebi Package Installer" using the radio buttons if it's on the list. If it isn't, click "Add", go to "use a custom command", and enter "gdebi", withou the quotes.
Go to the properties of one package, go to the "Open With" tab, and choose "GDebi Package Installer" using the radio buttons if it's on the list. If it isn't, click "Add", go to "use a custom command", and enter "gdebi", withou the quotes.