Put the files in ZIP (Compressed) files. Use Winzip or similar - or the
built in "compressed files" option in Windows 98 upwards (including XP) then
in your web site, link to the zip files, categorise them etc in to a useable
order. Upload the pages and the Zip files.
When the user clicks a link the download dialogue will open and prompt user
to save to a location of their choosing.
Or you could run it as a database driven site (but this might get
complicated if you're new at this type of stuff).