Configuration required:

An expanded Z88 with at least 256K of RAM (internal slot 0 or in slot 1).
An 1M flash card in slot 3 (all Intel and AMD flash cards are accepted).
The ROMupdate package.

Installation procedure:

Upload the binaries images and ROMupdate program files in RAM device.
From the FILER execute the "romupdate.cli" file with <>EX command.
After ROMupdate has completed put flash card in slot 1 and RAM card in slot 2 (if you have one).
Hard reset your Z88.
Now your Z88 is running OZ V4.2 directly from slot 1.

Test your new OZ by using HELP key and left cursor key. It should display build release 3087.