Copio y pego de un forero de xda para instalar y usar cwm
translation:
del /system/recovery-from-boot.p and /system/etc/install-recovery.sh (or it will recover stock recovery after boot) actually you can just boot your phone to recovery mode after you flashed cwm to prevent it.
1. turn off your phone
2. boot to Droidboot (vol up+vol down+power)
3. when the phone in Droidboot start the .bat file needed (stock or cwm)
https://docs.google.com/file/d/0B4Tt...ZjUHF1VVk/edit