I sent you this on Github but figured I could document here as well:
https://www.moddb.com/games/star-wars-battlefront/downloads/swbf1-swbf2-soundenv-for-modders

This has all the sounds in the game in it, in an environment that would resemble what the devs have.

Yeah it might be useful to expand this to create your own SFX to completely avoid the goofiness that overwriting causes.  A lot works, but a lot has issues.

I'll poke around and see if I can streamline any of this.  Sound tutorials are here but for this scenario there might be an alternate method considering we can now extract or use the global sound env, which did not exist when this post was made.

SWBF1 Mission Builder for PS2

https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=1673

If the original modder is around, they could reply and replace with the original units.

However, if that wasn't their intent, and there's no source files, then it's likely harder than the effort it's worth.

Think of it this way, that was a design decision by the modder and they wanted the map to be played with their custom classes. 

KT-400 (Old Republic) Freighter

https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=1672

I am planning to add more fixes and improvements in the future to the 1.2 version.  I've been pretty busy but the project isn't dead in any way.  I open it and label more functions and add more to my documentation and cheat tables as I have time and motivation.

If that group (or any other one) wants to add the improvements to 1.3.7 or collab with Antstafer's mod, that's fine, but I personally don't have any plans to do that.  It's possible I may use their findings as a reference for my own research in the future, but I don't plan to personally port my updates up to the Steam version.

Ah I see where the thread ended 13 years ago without a resolution.

I'll take a look and see if I have a copy on an old machine.  It's a long shot but I also rarely delete anything.

https://www.swbfgamers.com/index.php?topic=15088.msg128086

Posted them with a local download

https://www.swbfgamers.com/index.php?topic=15088.msg128086;topicseen#new

Red04's Conversion Pack Assets

https://www.swbfgamers.com/index.php?action=downloads;sa=view;down=1671

https://www.swbfii.com/holonet/guide-getting-your-playstation-2-online

Have you attempted these settings?  There are people that play coordinated events on the PS2 that use these settings.

DylanRocket's channel is really good for that: https://www.youtube.com/playlist?list=PLLgnHhItWZCsKi41G_tyxFKVI8Yha7f38 (I think they have other playlists as well)
I also have a playlist dedicated to this exact topic: https://www.youtube.com/playlist?list=PLl30b7cfBY7FwwkDlbp_penzRhG3usQxy

Alright, so we need to break this down a little bit.  The sound munge process is fragile but does work as designed - I've used it in my mod maps successfully.

The way batch files work is a chained process. You can't run the bat files by themselves or they will fail because they lose context that gets passed from the original munge.bat file.  You could theoretically build a separate environment and cut out the BFBuilder/chained munge but the environment was built in a way to try to make it seamless.  The bad part is that if something fails, it usually does not give a detailed error.

I'm not 100% sure what you're trying to accomplish though. Some common pitfalls while we're at a high level:
1.) Files marked read-only (shouldn't really matter but the munge can choke)
2.) Files being empty (some of the builders are fragile)

The title implies that we're trying to use shipped audio streams.  The final games audio streams and sfx are not included with the mod tools for legal reasons, and thus only referencing them will cause errors.

I recommend this for some experimentation material:
https://www.moddb.com/games/star-wars-battlefront-ii/downloads/swbf1-swbf2-soundenv-for-modders
This is a recreation of both games entire sound environments and you can see how it is handled in there.  Every audio stream in both games is included and can be moved into your folder if desired.

Thanks, glad you are getting some use out of it!

Also here's a couple threads:
https://www.swbfgamers.com/index.php?topic=13839.0
https://www.swbfgamers.com/index.php?topic=6176.0

Both methods are fine, I think that mine may have an issue where you could run out of sound memory, but I haven't personally tried Dave's method.