Getting models from Destroy All Humans! 2 PKG files

[kotskapii]

I'm looking for a way of getting models and textures out of some PKG files I extracted from an ISO of Destroy All Humans! 2 for PS2.

DISCARD.PKG
https://www.megaupload2.com/1a17c3f28462befc

RESIDENT.PKG
https://www.megaupload2.com/abd2aceb4725d3ea

STREAM.PKG
https://www.megaupload2.com/a96cbcb63fb55df2

TU.DIR
https://www.megaupload2.com/6f5c27e2c43f888d

I found this (https://zenhax.com/viewtopic.php?t=7911&view=next) written about a similar problem with the previous game so I'm fairly certain that using BMS to extract them is possible, but I have no clue what to do.