How to install MidnightRom if you do not have S-OFF:
First of all you need to have fastboot & adb installed, as well as the drivers for the evo 3d. See
This Thread for more information.
Step 1:
Download the latest version of MidnightRom (or the version you want to use), put it on your phone, and install it using recovery.
Step 2: Extract the MidnightRom zip file on your computer. Take the boot.img file that is in the extracted folder and put it in C:\android\platform-tools\ (or wherever you have your platform-tools for the adb at)
Step 3: Reboot your Phone into the bootloader
This can either be done by powering off your phone, then pressing and holding the power and volume down buttons.
Make sure it says "Fastboot USB" highlighted in red. If not, select the fastboot option.
Step 4: Test if it your device has been detected with the following command:
Step 5:
Execute this command
Code:
fastboot flash boot boot.img
Step 6:
Reboot your phone using this command