Changing Existing Sounds

[Gary Jibb]

Can someone help me figure out how to switch the sound files for sounds I think are more appropriate for the specific mod?
I don't want to say what mod/s because it would just be modified for me and don't want to cause any problems with the original makers of the mod.

I went into the sounds folders of the specific cars and physically switched the sounds with ones I liked but they did not work or overlap properly.
Do I need to open up any of the other files and/or modify anything else?

Thanks.