icon.sys file format
--------------------

file should always be 964 bytes

offset	length	description
----------------------------------------------------------------------
  0		  4		PS2D
  4		  2		0
  6		  2		offset of 2nd line in titlename
  8		  4		0
 12		  4		background transparency when save is selected in ps2 browser.
 				0x00(transparent) to 0x80(opaque)
 16		 16		background color upper left  (RGB-) 0x00 - 0x80
 32		 16		background color upper right (RGB-) 0x00 - 0x80
 48		 16		background color lower left  (RGB-) 0x00 - 0x80
 64		 16		background color lower right (RGB-) 0x00 - 0x80
 80		 16		light 1 direction
 96		 16		light 2 direction
112		 16		light 3 direction
128		 16		light 1 RGB-
144		 16		light 2 RGB-
160		 16		light 3 RGB-
176		 16		ambient light RGB-
192		 68		title name of savegame (null terminated, S-JIS format)
260		 64		filename of normal icon (null terminated)
324		 64		filename of icon file displayed when copying (null terminated)
388		 64		filename of icon file displayed when deleting (null terminated)
452		512		0


