Downloaded the zip-file. Unpacked it. Got .dll file. Put .dll file in the map 'components' + general map of Foobar2000, which is within 'Program Files'.
This component was originally written for Windows 2000 and Windows XP. It is not guaranteed to cooperate with newer versions of Windows.Kernel Streaming is known to work on certain Windows Vista and Windows 7 configurations, but not with devices having WaveRT drivers such as High Definition Audio Devices integrated with newer motherboards - such devices simply won't be shown on foobar2000's output device list as available KS devices.
The Kernel Streaming component is indeed within the overview of the components, but trying to install it remains grey and so I cannot install it.