The zip file has drivers for almost all operating systems for the RL100 NEet work adaptor card. To install for windows 98 just use the .inf file when prompted for driver file. Windows will say some of the files are not available , but it is actually available on the zip file in some other directories. so you may have to search and show the location of the file to windows. Other wise no problem with installation. Details about using it for other operating systems included in the respectieve directories.