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To use the port you need to perform the following steps:

1) Place your image files into %%DATADIR%%.
2) Add the following to /etc/rc.conf[.local] to enable it:

   splash_changer_enable="YES"

3) Enable the boot splash screen as described in splash(4) and set the
   following in /boot/loader.conf[.local]:

   bitmap_name="/boot/splash"

Also, be careful if you already have a file "/boot/splash" because it will be
replaced when the script is executed.

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