[xsl] Dita OT changing page size for a single image

[Geert Bormans <geert@xxxxxxxxxxxxxxxxxxx>]

Hi all,

Anyone out there with some experience using Dita Open Toolkit for PDF.
I have to change some stuff others did based on the "idiom 
technologies" customisation
(code seems messy at first sight)

I need to break out of the body-sequence master reference (A4 or 
folio) for A3 images

the map has topics in parts directly and in chapters in parts
part/topic and part/chapter/topic

the page sequence is started on the part level, the images are in topics,
so I might need to break in the middle of a chapter

Does anyone have a view on how to elegantly break this.
Grouping would mean pulling in all the chapter logic as well.
That is how I would tackle this, but given the code base that would 
be a risky job

Or is there a XSL:FO magic wand that can overrule the page size for a 
brief moment (keeping all the other page master settings).
That would be the killer app in this case

Thanks in advance

Geert