As I said - try it. Some works without fiddling. Some works if you change the compatibility settings once its installed (right click the program / shortcut and select properties and click the Compatibility tab - you can do this on existing programs installed to see what sort of thing is available). Some doesn't work, full stop.
Irrespective of what is said on the CD why not stick it in your machine to see what happens. I have done just that with software designed for W95 & found it works perfectly well on both W2k & XP without using the compatibility wizard.