Try flashing the ROM before running the update. If all seems well, then you probably don't need to bother flashing this. If, on the other hand, weird things happen, you may need to flash the firmware update below.To flash this ROM, you may need to flash a firmware update. If you are on HBOOT 1.40 Revolutionary S-OFF (or are 1.50 S-OFF), you're all ready to go. Just place freeza's firmware update ZIP file in the root of your SD Card. Then boot into the bootloader, and follow the update directions onscreen.If you are on 1.50 HTCDev unlocked, you will need to downgrade your HBOOT to 1.40 by using Unknownforce's HBOOT downgrade method. I have a Live CD in my thread that's already set up and ready for the downgrade process (for people not comfortable in Linux).This method does require you to purposely brick your phone. You will unbrick shortly afterwords. I promise you that it's not as scary as it seems!There are people in both threads that are more than willing to help you.I'll try to keep this post updated as I hear more about the situation with the new ROM.Happy flashing!~co~