Icon based on NFO tag?

I’ve been muddling with some skin mods trying to figure some of it out and move things around. I’ve been influenced by a few different skins so didn’t think posting in a specific skin thread was the correct place for this (or if this is even it).

I’ve been able to add a flag based on a NFO tag to the DialogVideoInfo.xml which works. The flag only shows up when the tag is present in a movie’s NFO.

I’ve been trying to get the same thing to work in MyVideoNav.xml and DialogFullScreenInfo.xml. It doesn’t seem to work based on <visible>SubString(ListItem.tag,Oscar)</visible> that does in the DialogVideoInfo.xml. It’s a flag for an Oscar statue to pop up for movies that have won Best Picture which I can manually add as a tag through the Edit Information in the options on a movie. It works great in the movie info screen but I can’t get it to work on the other screens.

I have tried reading from the wiki and skinning manual but there’s a lot of information that seems to cover a wide range of instances but not specifically imply to any/all so I’m a bit confused.

Is what I am trying to do even possible or maybe there’s another method I’ve not discovered as yet?