I need help to install CV64/3D on my 15" LCD Monitor

[zipper]

Probably nothing, but you have to adjust your settings to something your monitor accepts (1024x768@60 Hz) by adjusting the pixel clock - or if you got something like it, some minor adjustments may be needed still.

[zipper]

You should also know what's the minimum refresh (50 or 56 probably) and so building screen modes should keep the refresh between 60 and 75 Hz - and the better the nearer 60 or 75 (don't know how for instance 63.88 Hz would work...)

[zipper]

Old versions of CGX and Picasso96 on the same partition may cause all kinds of problems, even preventing RTG to work. Best to keep just one of them. Latest versions can work but then you need to change screenmode.prefs by hand and move monitor files prior reboot to change from one system to another - or use 2 boot partitions (like I do).