Looks like possible success.
In recovery, deleted,wiped all partitions, then flashed .img, pulled batt to shut down, entered recovery again, flashed arhd, wiping cache in aroma, rebooted and lo and behold it has successfully booted into os. Not sure if radio and all is good, but hey this is certainly the farthest I've been.
I hadn't seen this - congrats! You're getting pretty good at this.
ARHD ought to be already rooted - look for a superuser app in the drawer.
Let me know if everything works.
I suppose if I wanted to try the viper, Id have to flash the boot img also before flashing rom.
Yeah, I don't think that's wise.
Without radio support and current links, you could go from almost working to paperweight in the blink of an eye.
I assume that you got the gold card s-off info from here -
http://forum.xda-developers.com/showthread.php?t=2169518
That's the EasyAceRootTool.
I've disassembled it.
In 2010 my first HTC root took 78 steps, including an s-off engineering bootloader - and I had to do them by hand.
The EasyAceRootTool will root your stock rom and install busybox and CWM recovery. I wouldn't take it any further and if it were my phone, I'd avoid s-off and changing hboot at all costs.
If ARHD doesn't work right, restore the stock nandroid and try the tool.
Meanwhile, make a nandroid of ARHD asap if you haven't already - you don't want to go through another install like that.
Best luck with ARHD, finger crossed it's all good - and happy father's day!