The rules are:
* If CRC of tile 2518 has changed, use that.
* If CRC of tile 2046 has changed, use that.
* If tile 2518 is not present, use tile 2046
* otherwise use tile 2518.
This allows display of Cryptic Passage's title screen while still using the "with Plasma" version for the regular game.
Tying the start-of-episode cutscene to the cluster does not really work because it gets triggered by all maps of the cluster.
All currently existing intro cutscenes are tied to the map anyway.
Also correcting transition movie name for RRRA E2L1.
