These are the final Mighty ROMs for the HTC CDMA Diamond (Sprint, Alltel,
but NOT Verizon).
MR4 is based on WM 6.1, MR6 is based on WM6.5. My personal opinion is that
MR4 is the better of the two.

Also here are two patches, both for MR4. One is to fix the SMS 2016 bug
that started in 2010 (hex 10 is decimal 16). The other is the package
need to activate Sprint data and update the PRL.
Icon  Name                            Last modified      Size  Description
[DIR] Parent Directory - [TXT] HEADER 04-Oct-2010 13:24 389 [   ] MightyROM4_06.20.09_Victor.exe 26-Jun-2009 15:01 82M [   ] MightyROM6_Victor.exe 29-Jun-2010 01:49 93M [   ] SMS Sprint 2016 fix.cab 24-Jul-2010 00:48 315K [   ] sprint update profile & prl.cab 29-Jun-2009 15:52 544K