I don't think OS 8 uses the file exchange control panel to handle what apps do which files so that means you need to go to the options/preferences of internet explorer or netscape and change the helper file settings. In there, you have to scroll and look for the ".jpg". Select that row, then click on edit. In there, you should be able to choose which app opens and saves that type of file. If OS 8 does have the file exchange ctrl panel, then it's a similar process.