This is the .zip to grant temporary root to your device. Currently this is only tested on the BrightStart device. You can see the software number in the file name.
The boot.img is located inside.
1. Unlock bootloader via htcdev.com (I was able to do it when originally testing; however, I've heard other people have had issues.
2. Download file below.
3. Boot into fastboot
fastboot oem rebootRUU
fastboot flash zip A3_root_boot.zip reboot
This is more of a starter for other developers to begin work, but please Thank Me and reference here if you utilize this at all.
Also, the process was a little easier for me since I was working with HTC and eventually was using s-off devices.