[Q] How to flash an hboot with fastboot/adb

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http://forum.xda-developers.com – Clockworkmod recovery doesn't work(only get a blank screen after I make my selection), and my phone wont boot. I'm trying to flash a rom via fastboot or adb. I installed fastboot and adb using this guide: fastboot adb guide I downloaded htc sync to install the drivers. I'm trying to follow this guide for flashing a new rom xda flashing guide when i try "fastboot -w" the command prompt returns "erasing 'userdate'... FAILED <remote: not allowed>" it seems the sollution for this is posted here. but i don't know how to flash an hboot. Can anyone point me in (HowTos)