I've been away from SZ for a while and just saw this post. I DO have a Tyros 5 and agree that Free Play styles are great for hymns. However there's a bit of misinformation here...
Free play styles don't "follow" your tempo. They don't have a drum track or rhythmic bass, mostly just pads and chord phrases with a lengthy attack and release so they are quite flexible.
They can be programmed and pretty much duplicated using only SFF1 technology. Ian on the PSRtutorial forum created a free play style that worked on my old PSR-S900.
Like you, Ted, I've been mostly away from SZ lately, and I also saw the info posted by Bachus...and, you are right...FreePlay styles don't follow your tempo...rather, the bass line and pads (and chord sections) all retrigger smoothly allowing rubato playing. For my own freeplay styles (I'm using a Tyros4) I've added/subbed in string/pad phrases that slowly evolve over time...these were taken from (and modified) from other Yamaha styles.
The style I made for your S900 (and earlier 3K) has no mega voices so will probably convert easier to other formats (Korg/Roland) and was originally based on a still current Yamaha style called
PianoOrchBallad which I first discovered on the extra style disk that came with the old PSR-2000!
It's also on some Clavinova CVP instruments.
Yamaha FreePlay styles with mega (or SA/SA2) voices might be a lot trickier to convert, but with proper tweaking, may work satisfactorily on other brands, however, sometimes the juice may not be worth the squeeze.
Ian
PS...The occasional use of the
Sync/Stop button adds a nice touch.