This is the Windows 2000 driver for the Rockwell Riptide Chameleon ComboCard (audio and soft-modem) as provided by HP. They don't support it and make it difficult to find on their site, which is why I posted it here, but it worked with both the modem and sound on my HP Pavilion 8665C. It is a self-extracting archive, just unpack to any directory, run "Update Driver..." on the unrecognized hardware in "Device Manager", select "Display list of drivers...", "Have Disk...", navigate to the directory with the drivers and select the proper one.
The following files are found inside the driver download file.
|4321162k.cat||24 bytes||12 Aug 1999|
|riptide.cat||167 bytes||2 Sep 1999|
|rthwcls.sys||35.9 KB||4 Oct 1999|
|disk1||27 bytes||10 Oct 1998|
|crtaud.sys||144.6 KB||4 Oct 1999|
|rpfun.sys||3.7 KB||4 Oct 1999|
|riptide.hex||16.0 KB||27 Jul 1999|
|WINACPCI.sys||796.3 KB||9 Sep 1999|
|riptide.inf||14.2 KB||6 Oct 1999|
|rss8007_w2k.inf||31.8 KB||7 Oct 1999|