Hacking The how's of re-inserting a VRAM palette edit?

[PSXCraver]

Alright.
The game i decided to test this with is: DragonBall z legends.

So, I did a save state with the VRAM viewer on with NO$PSX. Before that, I also had the red box highlighting the image in question and then saved it uncompressed as .sna.

I opened the previous save state in PVV without any problem.

Now, my issue becomes:

Can I encircle with a square box at the text I want to modify and then, export, edit and then reapply it on in the save state within PVV then run it back on the debbuger with its changes intact?

Or there no other way then somehow coding a tool to extract the unknown image format then insert it too?