Use Rom Manager for best results when backing/restoring...
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~
Make sure fastboot is unchecked in power options and turn phone completely off
~Boot into HBOOT then Fastboot
~From fastboot. Use command "fastboot erase cache"
~From fastboot. Use command "fastboot flash recovery recovery.img"
OR
~Flash via Rom Manager(must have root already)
Video Tutorials:
How To Unlock The Bootloader EASIEST Method
How To ROOT EASIEST METHOD
Downloads:
You can now flash in Rom Manager in rom if rooted
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PC USB Mass Storage:
You can't! :(