unrEVOked is a very useful tool that allows you to flash a custom recovery image to your Android phone.

A custom recovery image allows you to perform advanced tasks on the system partition, such as flashing custom ROMs and taking a full backup of your phone (a “nandroid” backup).

unrevoked comes with NO WARRANTY (express or implied), and NO GUARANTEE OF FITNESS for any particular task. Although the developers have attempted to minimize the risk the best they could, the authors disclaim any chance of damage to your phone. The entire risk of running unrevoked lies with you, the user.

Here are some key features of "unrEVOked":

Ссылка: http://download../recovery/3.32/Reflash.dmg