just follow 4.34. It states that the inf file is found on the KN7000 installation disk, in fact it is in the root and thus you cannot really miss it. Select Have Disk and browse to the cd and you find the file.

For the fifth time I'll say it is not guaranteed to work with extensions and hubs; if it does work, it will be a matter of luck depending on the individual hardware, cables and circumstances. Thus it is not possible to make assumptions about anything, it will either work or it will not, or just parts of it may work.