Getting splashimaage working with Slack
I'm not sure if you've found an answer to this or not. I've just been working on getting splashimage working with my Slack 9. I never get it working with LFS or Slack...YET.
I am getting closer, though. I think just patching the sorce, then the usual ./configure, make && make install just isn't good enough. If you have an existing installation of Grub, you really need to remove the /boot/grub directory, then reinstall it with grub-install. I think the splashimage is in one of the stage files. If you don't recreate it, it won't be there.
I haven't tested this out just yet. I'm looking for images to use. I'm lazy and have almost 0 artistic skill. I could use the LFS one, but I want something that is about something other than a distro.
When I find out if this works or not, I'll try to come back and post my results.