Capturing Game Splash Screens

[midehue]

I'm having trouble recording the first few seconds of games' splash screens. I have the hook option "Start Movie Capture when detected" selected under advanced settings in Dxtory, but it still takes a while to start recording.
Can this be improved to capture the initial splash screen in its entirety?
Does Dxtory's ability to quickly capture a game source improve with higher PC specs?  (I'm in need of an upgrade anyway)
Can Dxtory capture a screen region rather than game source?

[ExKoder]

Please submit a Environment Information.

http://forum.exkode.com/index.php?topic=2.0