propset on svn:log

Hi,

I'm administrating a subversion repository and as mentioned in the SVN Book
the most common use of propset svn:log is changing wrong comitt messages on
this revision property.
I understand that you won't allow any remote user to change them but I'd like
to do this with an administrative account directly on the machine without
activating the pre-revprop hook script.
I could enable a pre-revprop hook and just ask if the user trying to change
the svn:log property is the special admin user and then exit with status 1,
but is it possible to change the svn:log without a pre-revprop hook too?

kr,
Reinhard

-- 
Reinhard Brandstaedter
Wiener Str. 28                  phone: 0043 699 12419541
4020 Linz                       icq:   73059068
Austria                         email: r.brandstaedter@gmx.at