Hacking Help unpacking Arc file from Mimana-Iyar Chronicles

[discPistol]

Hey guys, I'm pretty new to modding. Sorry if this is a rookie question. I'm trying to extract the sprites from Mimana-Iyar Chronicles, which I have as an iso. I am able to unpack the iso, which extracts to a few folders.
PSP_Game/SYSDIR
PSP_Game/USDIR
in the USDIR folder, we have the biggest file in the lot, an Arc called pa.arc. I'm guessing this is where to look for assets. But I can't seem to extract from it. I've tried a few different unpackers, but nothing seems to work. I think it's some sort of proprietary compression. Any suggestions would be appreciated!

thanks yall,
-disc

 

[Gil_Unx]

I have seen the file before,the image file using uncompressed * .gim.
Just search on google Sky`s Console File Scanner, for fast extract / reimport