New UNLOCKABLE Sprint ROM?

[hagen01]

I have a Sprint Touch Diamond and tried to unlock it using the "Diamond Unlocker". It fails every time with ERROR 262: UPDATE ERROR. I've run the unlock *both* in the WM 6.1 UI and in bootloader mode (hold down power + Volume down buttons as it boots).

Despite ROM updates failing, the bootloader tells me my phone is "Security Unlocked".

Yet, I can't install any of the ROMs out there! E.g., I want to use Juicy 2.1 Sprint but it fails with that same 262 error in either the WM UI or bootloader.

Can someone tell me how to get another ROM on my Sprint Touch Diamond???