The file "phoebe.inf" is all you need for windows 98.
It seems to work fine.
I haven,t tested the file "setup.exe".
It appears to be a win3.x file
The following files are found inside the driver download file.
|Setcom.exe||47.3 KB||2 May 1997|
|PHOEBE.INF||22.3 KB||3 Jan 2002|