Copying Mac Netscape Prefs in OS X - users folder

I have 2 Mac computers - 17" desktop and 15" Titanium 
Power book.
When traveling I take the power book and just before I 
leave, I want to transfer the MAIL, SETTINGS, ADDRESS 
BOOK & BOOKMARKS etc. from the Users folder in one 
computer to the users folder in the other and then back 
again, with all the new mail, when I return from traveling.

I have tried various ways to do this including copying 
with FoldersSynchronizer.app
I use the Target Mode (with firewire cable) from one 
machine to mount the HD icon on the other machine, so 
copying can proceed.
When I have finished (with the firewire cable still 
connected) I launch Netscape 702 and everything works 
perfectly.  As soon as I remove the firewire cable and 
then launch Netscape 702 again, an error message comes 
up advising that the directory cannot be located and 
either select another profile or create a new profile 
-- even though the one I just copied is there !!!

It is not recognized and apparently has lost the path 
from the prefs to the application.
Normally one can open a file from within an 
application, but Netscape 702 makes no provision for this.
Perhaps there is something else I should have copied 
from another location, but I cannot find any other 
Netscape directory.

Please advise how this can be done and
(TYIA) Thank You In Advance !!!
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