This track is Autumn Woods, the autumn version of Country Woods, without snow and with the texture of Hometown. To install it put "trk004" folder that you find in the downloaded Zip file into "C:/Program Files/Electronic Arts/Nfs3/Nfs3/Gamedata/Tracks" and replace the existing one. You are allowed to create a project using as a base my track but please contact me first on my e-mail "opusivgamer@gmail.com" and give me credits if you have my permission.
Visit my Youtube channel "Opus IV Gamer" (https://www.youtube.com/channel/UCoIje9MbCb2TOtrMmGttYNg) to see a lot of videos that I made on Need for Speed III Hot Pursuit and don't forget to subscribe to it for new coming videos.