Resouces and Improvements (sic)

[MqsTout]

I've been listening to the sounds unpacked from the FPK files. I noticed a misspelled "Resouces and Improvements" folder that has a lot of ambient sounds I don't recall hearing before. Does anyone know if they truly are not used and how one could make them play in the game?

I also just noticed the supermarket sound doesn't seem to be used, either -- as well as "BuildX" for most of the units. I'm sure there are plenty of others.