are you using version 2.40 of the unlocker? i found this to be the best bet.
note: This update can not be run by extracting the files and just running the RUU. If the self extracting executable doesn't work for you just run the .bat file to get everything started.
once you download the hardspl unlocker
ftp://up.ppcgeeks.com/Titan/Users/Im...rd-SPL-MFG.exe
as for your activesync issue when running it. it will tell you to disconnect the device and reconnect. when this happens you will see the script in bootloader mode change from serial to usb. when it says usb you will be connected to activesync and in most instances will make the connection sound that activesync does. than let it do its thing and you should be good.
if it doesnt work and your having the same issue make sure that you have activesync 6.5 downloaded for your computer and if you are x64 bit that you have the x64 bit attachment downloaded and installed as well to give yourself compatibility.
if you have to do the latter you should now be bootloader unlocked. you select your rom of desire either in the RUU package form or the exe form and than you flash that over to the device and it should work without issues. as for the files that you described above as using this is what those really are.
1. hardspl - thats the bootloadder unlocker itself. make sure you have version 2.40 and redownload it from that link just to be safe.
2. titan unlcoker- same think i linked you to above. (should work with the new activesync and keeping it connected through the process.)
3. titan radio rom- a non oem stock rom from htc or sprints website will not flash until the bootloader has been unlocked. unlocking the bootlader tricks the phone into believing that the rom you are flashing is a signed rom file.
4. dcd verizon carrier- this is the carrier cab that you would install after flashing a rom. cab files are application files for windows mobile as an apk is for android. all this cab will do is give you the correct mms settings, and other settings so your phone will run correctly on your network provider.
5. tinks titan verizon- this is a rom that you can flash once you are hardspl unlocked.
6. dcd_titan 4.12.exe- this is a rom file in the exe form rather than the RUU form. this can be flashed after you unlock in the same form that you unlocked.
hope this helps and let me know if you need any further assistance