Bovington, the price you say indicates you have FS2000 Pro version. Hope I'm not stating the obvious - but - to run FS2000 pro you must have DISK 2 in your cd rom drive and not disk 1. On disk 3 there are extra sound files that can be installed, not sure, but these may contain the sounds you seek. It was also recommended to do a complete install, which is arounf 1GB. It helps to improve speed etc.
There are several read me files on the cd's not sure if they'll help.