Yes, I located the SFZ VSTI in the Sonar Pro plugin browser. I loaded the player. I used the browser in the player to locate my soundfonts (SF2). But they will not load. As I mentioned, there is a Mini piano that comes with Sonar Pro that will load and play. It's just that all my other non Sonar soundfonts will not load into the player at all.
If the SFZ+ player is from 10 years ago, then, obviously, it's not available, though, it's a shame as it gives a lot of functions (ADSR, etc.) that would be useful.
Thanks.