Over the weekend i followed this guide i am go0ing to copy below, it works for all Sensations, rooted, bootloader locked and this is coming from someone that was locked to HBOOT 1.27 with the Vodafone ROM installed that was a disaster!!!
I now have a fully unlocked phone with a new ROM which i beleive has everything that you need to sort your phone out with all the correct Kernels etc so give it a try as i don't see any reason why this shouldn't sort out your phone as i tried to install another ROM after following this guide and did the same as you and was stuck at the white HTC screen but redid this guide and the phone suddenly burst into life so i would say the ROM he uses will sort you right out.
Follow this link:
[GUIDE] Flashing roms with S-ON and 1.27 HBOOT - xda-developers