Originally Posted by El Presidente
Be wary with ROM Manager. With the HTCdev bootloader unlock, you can't flash the boot or recovery partitions whilst in ROM, you have to be in fastboot.
Probably best to steer clear of ROM Manager altogether actually.
its a straight copy paste from XDA Sprint One forums - http://forum.xda-developers.com/showthread.php?t=2238324
I don't use Rom manager myself