The OS is called ApolloOS which is a 32 gig image you can download. I believe ApolloOS is 3.9.
P96 appears to be installed. I did not see the regular Workbench Screenmode Pref program. I did find the Picasso96Mode, The setting in there is SAGA, with Modes: TrueAlpha 37hz 50hz active. I will play with it some more this weekend.
The regular screen modes can be accessed in prefs using the MUIscreenmodes app fount in there. Its just like the standard 3.9 one.
This will not be an issue soon once they release the GOLD3 core. Also this "ApolloOS" is full of things that require GOLD3 and should even be used yet. I have no idea why the guy that released it has done it.