Well, new to this stuff - old unix fart ;o) know my way around the command prompt and found a howto for adding dvdcss with linuxmce, using google, that described using the script I used...
My system is undergoing reinstall now :-/
After reinstall... DVD I hope ;-)
Setup your core so that it has external network access etc as before... do the avWizard & setup Wizard etc (if installing from DVD you need to do that in Web Admin -> Advanced -> Network -> Network Settings after you have run the Wizards to setup external network access). Then after a 10-15 mins you should be able to go to 'Add Software' from the Orbiter... System -> Advanced -> Add Software. When in the Add Software screen you should see libdvdcss and W32 Codecs listed (if not then your Core has not picked up the config data for these yet... just wait as this is automatic but can take a little while)... just click on them to commence the install.
Now you should be able to play encrypted commercial DVD's without any problems ;-)
Hope the above helps