The installation process was painless on my CSPPC A4000.
The only problem so far was with ALGOR : Installed with Luciferin the needed classes & stack it worked fine on 4.1, but after the update it won`t boot WB (note that I can hold both usb-mouse buttons and call the early ss menu!).
Check out my Poseidon tutorial on my website
http://www.hd-zone.com under the AmigaOS 4.1 Classic section.
It may help.
