After that download the ClockWorkMod ROM Manager in Google Play store – Here
Enable USB Debugging – “Settings > Applications > Development > USB debugging”
Open ROM Manager app in your Samsung Galaxy Y
Click the “Flash ClockWorkMod Recovery“. This will download the ROM. So, you must enable network connection or Wifi. Then it will ask you to choose your phone model. Select Samsung Galaxy Mini as your phone.
After that the ROM will be downloaded. Then reboot your phone.