There is a Windows driver that works under Win 98. For Linux I don't need all the frills, just:
button 1 -- 'left click';

button 2 -- 'right click';

button 3 -- 'double-click'

button 4 -- 'drag lock button 1'.




Support Information:
Device Type: Input Devices (mouse, etc.)
Manufacturer: Kensington Products
Model: 64215 'Expert Mouse' (a 4-button trackball)
Interface: Other
Operating System: Linux
Age of Device: Not specified
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=544&qa5=9&qa7=3000&dp=3&qm0=64215+%27Expert+Mouse%27+%28a+4-button+trackball%29&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Kensington+Products+Input+Devices+%28mouse%2C+et c.%29++64215+%27Expert+Mouse%27+%28a+4-button+trackball%29+Linux+) | Research manufacturer Kensington Products (http://members.driverguide.com/index.php?action=getinfo&companyid=544)

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