Update to add a few more things.
-- Finished animating the smaller sponsor flags. By default they use the two flag textures the original track used. If you'd like to try something different, rename the flags_alt.kn5 file to flags.kn5. This one will give you a more modern F1 flag and add a FIA flag as well.
Copy and paste the code below to your existing ext_config file to hide the static flags. If you don't have an extension folder, use the one in the included config_file directory.
[MODEL_REPLACEMENT_...]
FILE=melbourne_2019.kn5
HIDE=objscenery25_sub0, sponsor_pole_flags
-- Added more standing crowds around the lake area. I do plan to add even more standing crowds in other areas. I want to watch a few videos of the F1 race first to see where they make sense to add them.
I've also done a few personal tweaks to make the track fit my eye better. If anyone might be interested in them, let me know and I can add them here as an optional install in the download package.