Well this is just odd...

[altgexx]

No matter how much I edit the palette of the PSP Dark Knight sprite, I can't seem to get it to work with my PSX iso. Well Shishi's readme did tell me it wouldn't work, I should've listened.  

[CidIII]

If I'm not mistaken you shouldn't need to do any editing, just take the sprite in Shishi's export it as a .SPR file, and import over the same sprite type into the PS1 version.