So, finally, my PP is now unconscious

This is what happened ...
Instead of fixing the USB issues, I decided to go buy a new one from bestbuy. I got Lexar USB3.0 (8GB). Installed alARM successfully on it ... it seemed like super fast as the installation went smoothly and was at a pretty decent speed compared to my previous USBs.
I then installed SAMBA on it. Then I decided to connect my 1tb HDD along with my 250GB HDD, and copied all the files over to my 1tb HDD (using the command that pepedog gave me). It worked like a charm, thanks pepedog.
Then I decided to unmount my 250GB HDD, and rebooted it with my 1tb HDD as all the files were copied over. I wasn't able to boot the device back again

I tried a few times without any luck.
Then I decided to reinstall alARM ... thinking that I may have messed up some settings when I switched back and forth between the HDDs. After I re-installed alARM ... now I can't boot into my PP ... If I take the USB out and boot without it ... it works fine, but with the USB, it doesn't work ...
I have tried 3 different USBs now, but all with the same results. What am I doing wrong? One thing I remember doing was:
When I was installing alARM, instead of using the uboot link that the instructions had ... I replaced it with the link that uboot upgrade had ... thinking I can kill two birds with one stone ... but I guess instead of killed the two birds, I might have killed my pogoplug ... LOL
Since then ... I have reverted back to using the same uboot link that the original instructions had ... and have resetted the uboot environment variables as well, but no luck

Any suggestions?