The specific problem is that there was no way to split a gallery with a
(Having two references to Facebook Photo Fetcher, with a more tag in between does not work either).
So I have edited the source of the plunging to introduce the functionality I need and I have added support for a more=n stanza to the plungin.
The edits (to version 1.2.8 of _output_gallery.php) are as follows:
1. At line 108 insert:
if( preg_match('/more=(\d+)/', $retVal['startTag'], $matches) ) $retVal['more'] =$matches;
2. At line 293 insert:
//Insert a more tag?
if( $params['more'] > 0 && $i == $params['more'] ) $retVal['content'] .= "<!--more-->\n\n";
An example usage is this:
This will insert a
<!--more--> tag after your eighth image. I suggest you set this number to be a multiple of your column count (with default settings, 4 or 8 are good numbers).
If you want you can download a pre-hacked version of _output_gallery.php in a zip file (note this will only work for version 1.2.8 of Justin Klein's plug-in).