This is for old firmware folks only! IF ARE RUNNING THE ICS LEAK FIRMWARE, DON'T FLASH THIS! Thanks again to jcase for posting this a couple months ago!
Warning: If you try to S-ON the device with this HBOOT on it, it will BRICK. Restore the original hboot first via RUU.
-1.S-OFF the device
0. Make sure you aren't on ICS firmware
1. CHECK MD5!!!!
2. Put PH98IMG.zip on SD card
3. Reboot to HBOOT
4. Flash bootloader when prompted with volume up.
HBOOT is probably the most critical part of the phone. If it bricks, it is not anyone's fault except yours!