Well it's starting to come back to me about replacing sound files. So I purchased Audio Shacks sound pack and watched his installation video but I cant find the folder with the Class ES44.proxyxml file in Railworks. I did a search and couldn't find the ES44.proxyxml on my computer.
I've been looking at other horn and bell instuctions and they say to copy file to this folder ( RailWorks\Assets\Kuju\RailSimulatorUS\Audio\RailVehicles\Diesel\ES44\Cab ) I only have the SD40.

Thanks for the help, you guys have been very helpful........
Dave