Requirements:

• HTC HD2. (Both LEO512 (standard) and LEO1024 TMOUS (T-Mobile USA) versions supported)
• MAGLDR 1.13 or later installed on your HTC HD2. See what is MAGLDR and how to install it.
• Your favorite Android SD card build. You can find many at the HTC HD2 SD Android Development section of XDA-Developers forums..I personally prefer American Android download from this URL

Procedure:

• Go through the instructions provided with your ROM carefully.
• Extract the contents of the downloaded ROM’s zip file and copy them to the SD card as instructed by the ROM developer.
• Configure any settings for the ROM as instructed by the developer.
• Power your HD2 off and boot it into MAGLDR menu by keeping the power button pressed.
• Go to Services > Boot Settings > AD SD Dir.
• Select the directory on your SD card that contains your Android build of choice. (You can have multiple Android ROMs setup on the SD card using the above steps and choose whichever you want to boot using this step.)
• Go to Services > Boot Settings > Boot source.
  • Select ‘Android from SD’ if you want this SD build to automatically boot when you power your device on.
  • Select ‘Android from NAND’ if you have an Android build installed on the internal NAND memory of your HD2 as well and want that one to automatically boot when your phone starts.
  • Select ‘WPH from NAND’ if you have Windows Phone 7 installed on your HD2 and want that to boot automatically upon powering the HD2 on.
• From the main MAGLDR menu, choose ‘Boot AD SD’ to boot into Android from the SD card.
• Follow any instructions provided with the ROM on what to do upon first boot. Usually it is a good idea to reboot the device once after the first boot. Also notice that it is normal for the first boot to take a long while.