I have a Amiga 4000 CSPPC with a Mediator + Radeon 9200, SB128 etc.
I have the Radeon working in OS3.9 and have made a couple of screenmodes but since the PicassoMode program is not very intuitive (to say the least) I am trying to get PicassoModeTNG to work.
I have downloaded the latest version (the link at the BoingBag4 site) but when I try to run it I get an "can not initialize - not enough memory" error.
I searched for a solutions but the only thing I could come across was to have the PIV monitor driver installed. But I got stuck there.
Anybody know how to fix that?
You need to plug in a hardware dongle known as a "Picasso IV"

Seriously, the PicassoModeTNG program actively checks for the presence of the "Picasso IV" board and will exit, complaining about memory issues. I put that in so as to mask the real reason.
There have been numerous requests to make the tool generally available, but I never quite got around to remove the hardware dependency tests. I can try again: now that I've actually managed to get Roadshow published, I feel like I can do anything...
Incidentally, some of the PicassoModeTNG functionality hinges on having decent monitor data to build upon (which is acquired through p4ddc.library), but you can actually start from scratch, too, and knit your own display mode.
One last thing: I have no idea if the APIs which PicassoModeTNG uses in order to display the mode you configured, and the display mode data file format are still operational in the current Picasso96 release. So that might actually be the biggest obstacle.