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Format of PocketNES (v8) GBA images:
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???? bytes:  POCKETNES.GBA contents
???? bytes:  Alignment Bytes
4 bytes:  Slash Screen type
          0 -  None
	  1 -  Raw
	  2+ - Size of LZO compressed screen
???? bytes:  Splash screen (240x160 15-bit, lzo compressed or raw)
???? bytes:  Alignment Bytes
4 bytss:  Rom Count
----
32 bytes:  ROM title (NULL terminated)
4 bytes:  ROM size (Compressed size, if applicable)
4 bytes:  ROM flags
4 bytes:  Autoscroll value (a.k.a. "sprite following")
4 bytes:  Checksum of 16K of ROM starting past NES header (16 bytes in)
???? bytes:  (Raw/Compressed) ROM contents (.NES format)
???? bytes:  Alignment Bytes
----
32 bytes:  Next ROM title
etc etc...
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Alignment Bytes:
   Fill in from 0 to 3 bytes of padding to cause the address to be a multiple
   of 4.  Padded bytes are *not* counted in any of the various size holders.  


ROM flags:
   Bit 0: Enable PPU speed hack
          (speeds up some games)
   Bit 1: Disable CPU speed hack
          (a few games need this to work, try this if a game seems buggy)
   Bit 2: Use PAL timing
          (sort of..)
   Bit 5: 0=Autoscroll value is a sprite number
          1=Autoscroll value is a memory location
   Everything else:  Reserved (set to 0)
