When you say that you can’t scale, are you talking about just in Photoshop itself, or in Pixnub?
SPA should work in PS 23.5.5. I haven’t heard of anything not working on it. Just to clarify, does SPA work on PS 24.3.0?
Can you provide more specifics of what happens when you try to add the player layers in 23.5.5? Can you post a screenshot of what it looks like when it gets stuck?