If you "tablet" is running Windows (not RT), you may be able to use e-Sword Hotkey. But there is no way to create hyperlinks in an external document that links to e-Sword. e-Sword just does not have the capability.
T4 has you have found can save a file as HTML. The scripture references to Bible Gateway in the version you set. But T4 also adds a "title" in the link which will act as a Tooltip Popup, no connection to the Internet or any other program required. It is part of the HTML file.
