SUCCESS!
Finally managed to install Picasso96 drivers and get WinUAE to work with them, all on my tod!
I've included a picture of my playing around with a 24-bit Amiga display, and I'm quite impressed by the speed, amongst other things! And finally, the Palette Preferences are finally working as they should! The Amiga is truly unfettered when it comes to 24-bit colour, and it's just a shame Commodore never finished a full 24-bit chipset, not one that was sold commercially, anyway. Yes, the Video Toaster (I think) is 24-bit, but not many home users got a chance to play with it. I'm just glad that the option of True Colour Workbench is open to us, via WinUAE. It's been fun!