When i have only one item in showcase with ten pictures in this item gallery, the block ShowcaseImages in XenPorta will show only one picture,
of course the album cover and only the album cover.
I think it will be nice to see the other nine pictures in xenporta of this one item too.
And now i hope you understand my german translation
You'd be better off requesting a custom Block/Widget as what you want to do would require to much modification/customization to the existing one (plus, I am NOT changing the existing one as it was a PAID request and can not change it).
I've created dozens of custom widgets/blocks for license holders.