[HD2 Android Q&A, Help & Troubleshooting and Genera] berrywr:
My advice to you is to start over from scratch and God knows I've done it a zillion times...from scratch here we go...

A1. Chase down and install the HD Toolkit and execute it!

A2. Remove your case, battery cover, and memory card. You will need a microUSB cord.

A3. I'm running Windows 8 Pro on my end and XP prior to it. Make sure your drivers are up to date.

A4. It won't matter if you're corded...plugged in to your computer or you insert the cord with each step.

B1. Press and hold you're volume down toggle, reinsert battery, and you will be quietly greeted with your bootloader's rainbow screen.

B2. Make sure you have "USB" at the bottom center.

B3. Click "Task 29" tab on HD2 ToolKit; this will wipe NAND on your device...it takes only seconds.

B4. The moment your device restarts again press and hold down your volume down toggle and again you will be greeted with your bootloader's rainbow screen. If you fail to get to this screen you will be greeted with "HTC" and that's it...just pull the battery and do it again.

C1. There are a gazillion ways to install the MAGLDR and Recovery but when I do it I click on MAGLDR and it too only takes a few seconds.

C2. The device will reboot automatically and let it. You will be greeted with the MAGLDR menu.

C3. Using your volume down toggle, scroll down to number 5 - USB Flasher

C4. You're looking for "Wait USB...USB"

C5. Open on your computer wherever you have your recovery files...again, there are a gazillion different ways to do this, but I use the cLK1.3_400mb partition for the EnergyROM.

C6. Open the folder and right click "DFT" Application

C7. Follow the prompts...you're looking for Waiting Connection to USB,,,be patient and pay attention to your device.

C8. Your device will respond by installing the file.

C9. From MAGLDR, scroll down to #8 Recovery...you will flash your Roms and other zip files from here.

D1. Using SD Formatter...format your card...it can be anything up to 64GB, really!

D2. Using Mini-Tool Partition Wizard you will perform the necessary steps to set your card up. I usually setup 75% of my card as Fat32 32K cluster, 25% EXT4 default cluster. The formatting of the Ext4 partition will take several minutes dependent upon the size of your card.

D3. Once done, while the card is still inserted to your computer, copy to your card all the zips you will need to flash your phone. You will not be able to see the Ext4 from Windows/File Explorer (Windows).

These steps are for NAND install; I've yet to successfully install EnergyROM by any other method than this way; newer ROMs, no problem regardless how you want to do it as long as your memory card is setup as above. There can be problems with your memory card, especially the slower ones. I recommend Class 6 or Class 10, though there are a few issues using the 64GB Class 10s. I've read the 16GB and 32GB Class 6's are pretty darn good. That said, I am using a 64GB SDXC I reformatted in my HD2. There is lag in the up to date Roms like NexusHD2 ICS and JB, but not enough to take away from a good experience....as long as you don't bog it any further down with resource hungry apps.

E1. At this stage the MAGLDR is the only thing on your device, reinsert the SD card to your device.

E2. Scroll down to #8 and follow the prompts

E3. I installed EnergyROM via NAND for T-Mobile

F1. Once all done and you have the three rings revolving around each other...enjoy.

F2. If you have T-Mobile Wi-Fi calling, use the appropriate file for the operating system; I'm not aware there is a JellyBean version; however, I've had no trouble with Gingerbread or ICS as long as you have the correct SIM card provisioned for it.

F3. I use App2Mgr to transfer what programs can be safely put on the SD card's Ext4. Music, Photos, Videos...you know the drill go on Fat32; you pray you don't have to reformat that part of the card given how much data you may have there.

Think positive! I can't tell you how many times I spent an evening enjoying Trial & Error on my couch! I usually read every known thread on the subject while experimenting.