How to Boot Android From an HD2 SD Card

1. Connect your HTC HD2 Windows Mobile phone to your computer system. Launch Windows Mobile Device Center from the 'All Programs' list in the Start menu. Check your system tray for the green connected icon. The icon turns green when the program detects your phone. Click the green sync icon, which has a pair of arrows on it, to sync your HTC HD2 data to your computer. You should back up this data prior to attempting the Android installation on the phone, to avoid potential data loss.

2. Launch a browser on your computer. Download an Android ROM that is compatible with the HTC HD2 from sites such as XDA-Developers.com or android.hd2roms.com. Each ROM comes with a features list that explains how it differs from other Android ROMs. For example, some ROMs launch the Gingerbread version of Android, while others go with earlier versions such as Froyo.

3. Double-click the ROM ZIP file and choose 'Extract' or use a third-party extraction software to unzip the folder. Extract the ROM files on your computer. Click 'Start' and 'Computer.' Drag the entire folder over to your phone's icon in the Computer menu listing. This process places the ROM files directly on the root of the SD card, which is the location they need to be in to work properly.

4. Remove your phone from the computer after the folder transfers over. Tap 'Start' and 'File Explorer' so you can access your SD card. Tap the 'SD card' and the 'Android' folder. Tap 'clrcad.exe' and 'haret.exe,' in that order, to enter the Android environment.