CA Express V5R1 to V5R2 upgrade messed up

The system that Check Service Level on my PC connects to updated from V5R1
to V5R2.
Next time the check ran I clicked to update to V5R2.  This failed part way
and wouldn't restart through Check Service Level, so I ran the SETUP.EXE
from \\myiseries.mycompany.com\qibm\ProdData\Access\Windows\Install\Image

That failed again part way through, so I had to start it again.

When I try to select the install method (Basic, PC5250, Custom, All) I got
the following message:

The following components cannot be installed.
 Reason:  IBM Personal Communications already installed
        5250 Display and Printer Emulator


Went ahead and upgraded, all appeaed to be OK except that trying to open
PC5250 SSL sessions would crash on my W2K Pro (Service Pack 3) PC with one
of those really useful messages:
PCSCM.EXE - Application Error
The instruction at "0x74c1c3b3" referenced memory at "0x00000000".  The
memory could not be "read".


So I uninstalled ALL of Client Access (iSeries Access), rebooted, and
tried again.  Still get:

The following components cannot be installed.
 Reason:  IBM Personal Communications already installed
        5250 Display and Printer Emulator


Now there's no mention of PCOMM or Client Access in Add/Remove Programs or
anywhere else.  I've deleted any Client Access stuff I could see in places
like Program Files/IBM/Client Access and in Documents and Settings/All
Users.  I've gone through the Registry and blown away all references I
could see to Personal Communications, PCOMM, Client Access, PC5250,
rebooted, and tried again.  STILL get the:

The following components cannot be installed.
 Reason:  IBM Personal Communications already installed
        5250 Display and Printer Emulator

when running SETUP.EXE to reinstall iSeries Access.

Does ANYONE have a clue just WHAT this install program is checking that
causes it to tell me I have IBM Personal Communications installed ?
It has NEVER been installed on this PC - only the PC5250 code that came
with previous versions of Client Access.

...Neil