Mugen no Frontier EXCEED Defining spritesheet frames help

[sar777]

I got the sprite sheets from a NDS game called Super Robot Taisen OG Saga - Mugen no Frontier EXCEED.
Trying to make sense of the pk2 files which defines each frame/frame to use/offset etc, that goes with them... but can't.

https://drive.google.com/open?id=1Y1lWQ8...9mpJmoLKWt