The Descriptions:

The New Nomad Weapon Sounds made by Chris
This mod will replace the nomad weapons, and the engine sounds into a better and more enhanced sounds.
To download the The New Nomad Weapon Sounds click here.
For installing and activating/deactivating Mods you can use the latest beta of the Freelancer Mod Manager beta 11 click here.

The Equipment Cart Sound Replacement Mod made by Chris
This mod will enhance the equipment cart sound movement of freelancer. Thus, making it realistic.
To download the The Equipment Cart Sound Replacement Mod click here.
For installing and activating/deactivating Mods you can use the latest beta of the Freelancer Mod Manager beta 11 click here.

The New Engine Sounds Mod made by Chris
This mod will replace the engine (rumble) sounds into a better and more enhanced sounds.
To download the The New Engine Sounds Mod click here.
For installing and activating/deactivating Mods you can use the latest beta of the Freelancer Mod Manager beta 11 click here.

The Realistic Sound Mod Part 2 Made by Chris
This mod is the second part of the Realistic Sound Mod. This mod will replace the sound when tractoring, jettisoning cargo, and interrupted tractoring.
To download the The Realistic Sound Mod Part 2 click here.
For installing and activating/deactivating Mods you can use the latest beta of the Freelancer Mod Manager beta 11 click here.

What exactly is the "Equipment Cart?" I'm not sure what that is.
And before I download it and deactivate my mods, reactivate some, then this one.. all that good stuff :p ,does this mod conflict with other mods? Will it cause the game to crash or cause certain aspects of gameplay to malfunction within other mods?
I've got MD's Rebalance v3.4 with the Upgrade activated, so that's the particular one I'm curious about.
If you aren't sure, that's alright; just let me know and I guess I'll test it myself
The sound mods sound great (no pun intended), but I just wanted to know before I deactivate my current mods, activate this one, start new game, watch video, and have to start game from scratch... and then have it crash Oh, that makes me wonder - if I activate the sound mod(s), do I have to start a new SP game? Or do they just modify sounds in any saved game so you don't have to start new game?
And one final question (sorry for the lengthy interrogation here ): Do the different sound mods (like the Nomad and the Equipment, or the Engine and the Realistic Sound mods) conflict with each other? Does the Realistic include the rest, or is there one that does include all of the sound mods?

Thanks!