missing instruments on cakewalk sound center

I just bought MC5, and some of the instruments seem to be missing. For example, the type "Brass" has the subtypes "Trumpet", "Trombone", "French Horn", and "Tuba", but only the Trumpet has a program. This is especially frustrating because one of my musical insparations I bought MC5 in the first place for has the French Horn as its main sound. But that's not all; many of the subtypes lack programs for sound. Are the French Horn and other instruments hidden somewhere in the program or should I return it, because I don't have money to buy some expansion pack everytime one of the listed instruments turns out not to be there.