gauges will be in the form of a ZIP file, others will simply be
contained in a Folder. The zipped gauges should be unzipped into
your TEMP folder.In both cases you will finally have a folder
containing the gauge files which will look like this
open the folder, select Edit, 'select all files'
drag them into the main GAUGES folder in FS2002/4, CFS2, etc
panel should then be viewable when you fly your plane.
there are other folders or zips you should read the README or INSTALL
text file for further information from the author.