I've also just tried to set:

$page->{...}{'toolbar'}{'standard'} = $toolbar->{'standard'};
[download]

before $toolbar->{'standard'} gets defined but it doesn't appear to work. I was expecting it to work as well.

I may have misstated a detail on the problem. The structure lays out a little more like this:

# $struct->{'toolbar'}{'standard'} does not exist at
# this point.  $struct->{'toolbar'} may or may not exist
$struct->{'page'}{...}{'toolbar'}{'standard'} = $struct->{'toolbar'}{'
+standard'};
[download]

This is more complete.