Header				8 Bytes
Identifier (SPZ2)	Type1	Texture2	unknown	Item Count
ASCII (4 bytes)	ubyte	ubyte	ubyte	ubyte
Image Load List 68 Bytes3 Filename ASCII (67 bytes3)

¹ Valid type values include:

Enum	Value
0	vp_parallel
1	vp_parallel_upright
2	oriented
3	vp_parallel_oriented
4	facing_upright

² Valid texture values include:

Enum	Value
0	normal
1	additive
2	indexalpha
3	alphatest

³ Image list names require at least one 00h value within the 68 bytes to act as a terminator so the limit most likely is 67 bytes.