Support and Adjustments for Splash Page Plugin

Is there a way to adjust the Fade setting on the opening and closing of the splash page? It would be nice to have a slower, more gradual fade into the site home page, on the click-to-close, or on the time-out close of the splash page.

Also, could you provide the file name into which the extra code is to be pasted?
In the plugin it states that in order for the splash page to display first, that the code below must be added to the 'theme tag' ??

<?php do_action('wsi_first_load_mode'); ?> after the <body>

Could the designer provide more details on the exact file name where this is to be added, and a screen shot of where in the file this additional code is to be inserted? This would be helpful.

Thanks