hi,
i´ve got Logitech EX-100 (wireless combo Keyboard+ optical mouse) and i´ve looked on the company website and they have this logitech desktop messenger.But i need just the driver like the one i got on CD when i bought this hardware.

Support Information:
Device Type: Input Devices (mouse, etc.)
Manufacturer: Logitech
Model: ex-100
Interface: Other
Operating System: Windows XP Professional
Age of Device: < 2 years old
FCCID:

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=605&qa5=9&qa7=1500&dp=2&qm0=ex-100&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Logitech+Input+Devices+%28mouse%2C+etc.%29++ex-100+Windows+XP+Professional+) | Research manufacturer Logitech (http://members.driverguide.com/index.php?action=getinfo&companyid=605)