BSP Tree Node Array
File id	$00	12	File id
Level id	$04	17	Level id
Not used	$08	1020	Not used
Packages	$1C	4	Amount of packages that follow
*Package		$20	$1C	4	16
Unknown	$00	4	Unknown
Unknown	$04	3	Unknown
High bit	$07	1	High bit
Unknown	$08	4	Unknown
Unknown	$0C	4	Unknown