This is the driver for the Rockwell Chameleon combo card (Modem and Sound card). This driver was for another hp model, but it will work for hp pavilion XL766. Download this file and unzip it to a temp directory. Reboot the computer, and when Windows 2000 starts up, it will automatically start the device installation for the modem and sound card. Tell it to search at the temp location, and installation should be automatic with answering yes/no questions. Good Luck!!!