I'll answer now briefly, and talk more later.
<p>
It is pretty obvious to an expert player which difficuly settings
were used when you watch an INP playback. In the case of Williams
games you can even watch the player set the difficulty settings
before he starts playing. Of course, the player would have to
set the difficulty sets during the inp recording, which is supported
by the newest versions of MAME.
<p>
In the case of centipede the spider is a lot more aggressive, and
likes to collide with the player.
<p>
I've watched a lot of INP files, but I'm more than willing to hear
expert players thoughts on the games they play.
<p>
Mark Longridge
Twin Galaxies Emulator Judge
--
cubeman@idirect.com