Help with verizon diamond upgrade

[bobv]

I just got a assurion replacement Verizon diamond for my old htc touch. The diamond is so slow and a pain in the a$$. I need to put a new rom on this thing before I end up throwing this one too. Everywhere I see any info about unlocking or flashing, it seems that it says there is no unlocker for this device. Could someone tell me for sure if this is true. And also recommend a rom and tell me the steps needed to change to a new rom. Thanks in advance.