This is a fast, stable, and clean ROM compiled from the source code of AOSP Gingerbread for Nexus One (GRJ22 / Android 2.3.4), optimized for HTC HD2, and released on June 28, 2011 by tytung.
Use the latest android-2.3.4_r1 source code. (Having a tag name means it is well-tested and stable.)
Kernel: tytung_r10 (Support Wi-Fi Calling, Wi-Fi IEEE 802.1x/EAP, native Wi-Fi Tethering, unique Wi-Fi/Bluetooth MAC address, low power mode Bluetooth, UTF-8, CIFS, Yaffs, Ext2/3/4, NILFS, ReiserFS, BTRFS, and the official HTC extended battery.)
You can also find the SD version for Windows Mobile 6.5.
Information
===========
This is compiled from AOSP Gingerbread for Passion (i.e. Nexus One)
and has some modifications as follows.
- block ads (replaced hosts)
- add utility and root permission (added busybox, su and Superuser.apk)
- add 720p video playback (replaced libOmxVdec.so)
- fix camera (replaced libOmxVidEnc.so and modified source code)
- fix camcorder (replaced with new cam libs and some .so files)
- add HSDPA icon (modified SystemUI.apk from source code)
- add Battery % icon (modified framework-res.apk)
- add Headset icon (modified framework-res.apk from source code)
- add Reboot menu (modified framework-res.apk, framework.jar and android.policy.jar from source code)
- add "Download any file type" support for Browser (modified DownloadProvider.apk from source code)
- fix USB Mass Storage and USB Tethering (modified vold and services.jar from source code)
- fix LED Notification (modified services.jar from source code)
- add "X" boot animation and ringtones from Nexus One Gingerbread
- add Nexus S Live Wallpaper
- add the latest Google Apps (Maps, Gmail, Market, etc.)
- add FM Radio (modified a lots of stuff from source code)
- add other necessary modifications to make it working on HD2
- remove Japanese and Chinese IMEs (removed OpenWnn.apk and PinyinIME.apk), etc.
- Use CWM (ClockworkMod) Recovery, providing the native Android update.zip installation and Nandroid backup and restore, to backup and/or update your system easily and safely.
- It's about 3~5mA battery consumption on standby when turning on WiFi, Bluetooth, GPS, and Auto Sync settings.
Working===========Everything is working.- Phone
- 3G/HSDPA (RMNET is fast and stable for MAGLDR. Or PPP for cLK.)
- Wi-Fi (Support IEEE 802.1x/EAP authentication and Ad-Hoc Wi-Fi.)
- Bluetooth (Support low power mode.) (Big thanks to Trilu and Charansingh)
- GPS (GPS_Libraries_v1.5 included) (Install libgps_Switcher_v1.5.zip to enable AGPS support and reduce the time of getting a GPS fix.)
- Network Location
- 720p Video Playback (H.264 up to 720p with hardware decoding)
- Camera (5MP)
- Camcorder (800x480, H.263 and 30fps with hardware encoding) (Courtesy of Gpc)
- LED Notification (Courtesy of Gpc)
- USB Mass Storage
- USB Tethering (Use build-in "USB tethering" feature directly or install Wired Tether 1.4.apk.)
- WiFi Tethering (Use build-in "Portable Wi-Fi hotspot" feature directly or install Wireless Tether 2.0.7.apk.)
- FM Radio
Tips===========This ROM is better than NexusHD2-Froyo now.Installations===========You should have either MAGLDR 1.13 or cLK 1.4.0.1 bootloader on device.- CWM (ClockworkMod) Recovery Version via SD card (Flash update.zip)
- Installing CWM_Recovery_for_NexusHD2 (135MB system and 2MB cache) to create a space-efficient NAND partition layout designed specifically for NexusHD2 series is highly recommended if coming from another ROM.
- For Android installation you need to enter CWM Recovery.
- CWM: backup and restore => Backup you current ROM first. (optional but recommended)
- CWM: wipe data/factory reset if coming from another ROM or wanting to have a clean installation. (optional but recommended)
- CWM: install zip from sdcard: locate NexusHD2-Gingerbread_V2.8_NAND_(Android-2.3.4)_update.zip to finish the Android installation.
Installation Guide for MAGLDR 1.13:
- Flash MAGLDR
- Download MAGLDR 1.13 (606 KB)
- Enter SPL by holding VOL DOWN key while booting the phone. (Make sure you have HSPL.)
- Run ROMUpdateUtility.exe to flash MAGLDR 1.13 (magldr.nbh).
- Flash ClockworkMod Recovery
- Download MAGLDR_CWM_Recovery_v3.2.0.0_for_NexusHD2_135M.zip (5.0 MB)
- Enter MAGLDR 1.13 by holding power key while booting the phone, and then select "USB Flasher" via "VolUp" and "VolDown". Confirm key is green "Call" button.
- Run DAF.exe to flash ClockworkMod Recovery 3.2.0.0 (recovery_3.2.0.0_leo.img).
- Flash Android ROM
Installation Guide for cLK 1.4.0.1:
- Flash cLK
- Flash ClockworkMod Recovery
- Download cLK_CWM_Recovery_v3.2.0.0.zip (5.0 MB)
- Enter fastboot mode by holding back key (left arrow) while booting the phone.
- Run fastboot_install_recovery.bat to flash ClockworkMod Recovery 3.2.0.0 (recovery_3.2.0.0_leo.img).
- Flash Android ROM
Extra:
- Flash some add-ons below if needed.
- Flash dtapps2sd-2.7.5.2-signed.zip for Apps2SD+ (Optional. Install it only when you install too many apps and the internal memory (i.e. data partition) is out of space.) (2.59 MB)
- Reboot
Uninstallation
===========
You should flash stock official Windows Mobile 6.5 ROM.
Credits:
========
Cotulla, TYTung, Hastarin, Markinus, Letama, Rajko, Gauner, Diem, Dan1j3l, RaiderX303, Pongster, Gpc, Cedesmith, Arne, Trilu, Charansingh, Seadersn, Arif-ali, etc.
Please consider making a donation to Cotulla for his great MAGLDR.
Please consider making a donation to Cedesmith for his great cLK.
And if you appreciate my work and want to buy me a drink, please consider making a donation too.

Thank you.
Add-ons:
This section is reserved for everyone.
If you can provide any new features via a flashable update.zip for CWM Recovery, I will place your name here.
The description is a must when you provide a file.
I don't test each add-on myself, please backup your current system before installing any of them.