ROM Hack unknown file type

[Weegloogi]

I'm trying to hack Lego indiana jones 1 for the DS, but the entire game seems to be compressed into a single .fib file (with magic header FUSE1.00)
I searched the internet but I didn't find anything about this file format. Is there anything known about these file formats?

 

[impeeza]

it appears the file is not the ROM but a extracted resource from the ROM:

https://zenhax.com/viewtopic.php?t=380