I could not find a driver on the Compaq site, and the modem drivers for Conexant on this site would not work. This is a 'home made' driver taking the required files one at a time from a configured Compaq PC and copying them to the new PC. WARNING contains Operating System specific files such as VMM32.VXD so only install it on a win98 PC, may only work with Win98SE - I don't know. Will probably mangle win95 if you try it on there.
PS - you may be asked to find a .cat file twice - hitting 'skip file' the second time seems to work OK - it's the same file it asks for first time anyway.
PPS - INF files are in an INF subdirectory - you will have to tell win98 to look in that dir to find the drivers )
Hope this works for you - came out of a presario 7400 and 7500 PC