Help to find (and replace) a PSX game picture

[Butterhands]

Game is european "Plucky's big adventure" (SLES_03547). I translated it 'cause in the european version italian language is missing, the translation is completed, overwriting deutch, but I replaced the deutch flag animation TIM, but before highlight it the flag is always a static deutch, 'cause is a part of a compressed background image, I mean compressed like a JPEG, I show it:


With the tools to search TIM scanning the iso in RAW mode I can't find this image, not even the character in the background, the TIM are uncompressed like quality, but this image is certainly another file type, you can see it by the picture quality, that is compressed.

Please, can you help me to find this image and how I could replace it? The translation is over and I miss only this detail to burn it to a blank CD.
December 22, 2017, 07:24:51 PM - (Auto Merged - Double Posts are not allowed before 7 days.)
The image is a 16 bit type, NOT a TIM. I found it with the memory dump using TiledGGD, but the problem is that in the RESOURCE.rsc file is compressed, 'cause the file is an archive that use the Warthog games compression.

TIMJPSXdec can extract and recompress files in the RESOURCE.rsc file, the TIM are compressed too, but don't work with 16 bit graphics, only TIM, PSX videos and audios.

Someone could know how recycle the TIMJPSXdec compression/decompression ability that works with this game?