Flash the Leak-V3 PB00IMG.ZIP ROM file using HBOOT.
PB00IMG.ZIP : 109,946,224 bytes ; md5sum: 1c0b0182356242a9d673a661e7458587
Announcement post for Leak V3 HTC ROM
. Direct link to download the Leak-V3 ROM is here.
An example of what this HBOOT method looks like with lots of pictures and instructions
(Ignore the comments about the "Root ROM" and "Battery Pull" - just let it run through all the way to the end.
After that, the phone might auto-detect it's eligibility for the July 2010 OTA - go ahead and let that run through. If it doesn't happen, you need to find the download for that OTA
and apply it using the stock recovery boot.
You get extra credit if you find the instructions for that last sentence on your own. (Hint: search for the words "recovery", "update.zip" and "OTA").