Steps:
Enter download mode
Flash hacked param.lfs IN HEIMDALL IN THE BOX THAT SAYS PARAM.LFS, NOT FACTORYFS
Reboot normally, if it boots into recovery just reboot again
Ignore garbled text on bootup
Copy your new bootlogo to /sdcard/logo.jpg
Open ADB shell
Enter these commands:
su
mount -o remount,rw /dev/block/stl6 /mnt/.lfs
cp /sdcard/logo.jpg /mnt/.lfs/logo.jpg