These are the steps to flash the Custom Rom on the HTC Titan.
Mine is an European Unlocked HTC Titan.
You need to download :
1)
DFT__HSPL_WP7SG1.rar
2)
DFT Eternity 24 langs Freedom V1 Pearl Edition.7z
3)
RUU_ETERNITY_Radio_Signed_17.5006.08.27_17.08.50.0 6.7z
To enter in SPL mode you have to press BOTH volume up and volume down while you turn on your device using the power button.
In SPL mode you will see a white screen with some informations like the version of the bootloader and the version of the radio driver. At the bottom of the SPL mode screen you will read something like "USB" and "IMAGE CRC" and "FACTORY RESET".
Steps :
1) Turn off your HTC Titan.
2) Turn on your HTC Titan while pressing BOTH volume up and volume down. You will enter SPL mode by doing so.
3) Unrar the compressed file DFT__HSPL_WP7SG1.rar
4) Go into DFT_HSPL_WP7SG1\1_SPL205\TITAN\ inside the directory where you extracted the file DFT__HSPL_WP7SG1.rar
5) Run ROMUpdateUtility.exe
6) Wait till the precedure finish to install SPL (0% -> 100%)
7) At the end of the procedure the device will reboot.
8) Enter SPL mode, or turn the device off and enter SPL mode again if you didn't make it in time.
9) Go into DFT_HSPL_WP7SG1\2_HSPL\
10) Run SFT_HSPL_WP7SG1_INSTALL.exe
11) Install HSPL following the istructions on screen.
12) At the end of the procedure the device will reboot.
13) Enter SPL mode, or turn the device off and enter SPL mode again if you didn't make it in time.
14) This time you should be able to read HSPL2.5.160015.3 and CotullaH at the top of the SPL screen
15) Unrar the compressed file DFT Eternity 24 langs Freedom V1 Pearl Edition.7z
16) Run ROMUpdateUtility.exe
17) Wait till the precedure finish to install the custom rom (0% -> 100% , it will be slower this time)
18) At the end of the procedure the device will reboot.
If now you are stuck on HTC screen (WP doesn't start up) you need to upgrade the radio driver :
19) Enter SPL mode, or turn the device off and enter SPL mode again if you didn't make it in time.
20) Unrar the compressed file RUU_ETERNITY_Radio_Signed_17.5006.08.27_17.08.50.0 6.7z
21) Start ROMUpdateUtility.exe
22) If you enter SPL mode one last time you should be able to see the updated radio driver version.
That's what I did to make it work on my Unlocked European HTC Titan.
EDIT : Instead of using "DFT Eternity 24 langs Freedom V1 Pearl Edition.7z" you can use any other ROM ... for example
ultrashot Dynamics7 v2.0 WP7.8
Fully Unlocked HTC Titan with DFT HSPL bootloader and ultrashot Dynamics7 v2.0 Custom ROM WP7.8 !
HowTo - What I did to Flash my Titan