here is what I've said on the other thread, about what I've tried to install ROMs since installing Cyanogen (rexchun's racer port from the blade release):
1) in order to use the bundled ClockworkMOD ROMManager, you must flash the recovery bootloader again - BUT since it's the standard Cyanogen app it doesn't have the ZTE Racer model in the list, and I am not tempted to brick my phone by installing a dud bootloader.
2) you can't manually flash the ROM using the existing bootloader, because the bootloader cannot detect the action of the resistive home button (and thus you cannot persuade it to DO anything...)
3) Cannot install any new ROMs, whether patch updates or whole system restores, because neither ROM Manager nor Recovery(Manager) will play ball with Sebastian 404's recovery from here.
Now additionally, I've forgotten which version of ROMmanager I originally installed to get the "recovery"/bootloader in place - was it different to the standard one now on my phone from Cyanogen? if not, why has it stopped recognising the racer in the recovery autoinstall?
any help much appreciated as this is blocking me installing google apps and thus installing ANY apps! :s