Sorry for a delay, here is an example swf mod for you. Download here:
https://www.photo.gallery/downloads/swf_mod.zip
Example here:
https://www.photo.gallery/imagevue/swf_mod/
It goes like this - unpack into your current imagevue directory, there is new popup.php and in content/groupfolder1/imagefolder1/ you will see 3 files:
1: tn_Dawn.jpg - thumbnail to display
2: Dawn.jpg - jpg file to be displayed in slideshow and gallery (must be the same width and height as *.swf)
3: Dawn.swf - swf made from that jpg
When viewing jpg press [open in popup] and you will see swf instead of jpg.