problem with pkgng

[Walter Hurry]

I am attempting to migrate a test box to pkgng, and have run into 
difficulty:

When I run the pkg2ng script, it fails to register postgreql-jdbc because 
one if its files, namely /usr/local/share/doc/postgresql/README-client, 
is also installed by postgresql-client-9.2.1.

In this, pkgng is perfectly correct, but how do I work around the issue? 
My assumption is that I will need to use pkg register with a hacked plist 
file from which the offending entry has been removed. Can anyone shed 
light on how to achieve this? I'm afraid I'm rather a novice at present.