Years ago,
Task Four Echo 4 was the "one-stop-shop" for all things SB; news, art mods, 3rd party scenarios, how-to articles, etc.
https://tfe4.wordpress.com/
Unfortunately, the website has not been maintained like it use to be, the last few years, and some images and links no longer exist or do not work.
I would suggest you check out the website and see what is out there for the different titles.
For example TOD and Vietnam both have one page of 3rd party scenarios and one page of 3rd party art mods.
https://tfe4.wordpress.com/graphics-and-...r-of-duty/
https://tfe4.wordpress.com/graphics-and-...s/vietnam/
https://tfe4.wordpress.com/sb-game-resou...r-of-duty/
https://tfe4.wordpress.com/sb-game-resources/vietnam2/
Also, a handy little tool to greatly help you control and use all third-party stuff is the program JSGME.
This tool helps you activate and deactivate mods with one click.
You can find more info about JSGME here:
https://www.theblitz.club/message_boards...?tid=65299