Okay what you need to do is flash a custom recovery. to do this visit this page and download on of the files I suggest Amon_RA 2.3, follow the install instructions on that page. After you are done tell me so we can go to the next step.
EDIT: Copy and pasted instructions
1) Download the appropriate PC36IMG.zip for whichever recovery image you want.
2) Rename the file to PC36IMG.zip, exactly, being careful to not rename it to PC36IMG.zip.zip or accidentally unzip the file.
3) Copy the file to the root of your sdcard (That mean the top level, not in any folders).
4) Boot into hboot by turning the phone off, then turning it back on while pressing and holding the volume down button.
5) Flash the file when prompted.
6) [optional] When done, rename or remove the PC36IMG.zip file, or it will prompt you to flash it again every time you boot back into hboot.
To copy the file when you are in Hboot it should have an option for USB storage or something like that, you are going to need to plug the phone into the computer then select that option.