Is only 85.27 MB and it can be installed directly into the phone's internal memory (NAND installation). Look here how to do, especially for this version: V2.8, NexusHD2-Gingerbread-2.3.4-NAND-Android-update.zip.
What's new at Nexus HD2 Gingerbread Android 2.3.4?Launched on June 28, 2011, this is a clean ROM, stable and fast, based on source code for Nexus One (AOSP gingerbread), which was subsequently optimized for HTC HD2.
Meanwhile, the old version (v2.7 NAND), were made the following changes:
Was added an FM Radio - (my opinion is that it's hard to handle), were included GPS_Libraries_v1.5_for_HD2_Gingerbread_update.zip, GB234_GpsLocationProvider_JNI_fix_update.zip,
GB234_call_delay_fix_update.zip, libaudio.so_with_Wonk_Fix_from_Gpc.zip (useless because all are problems in volume) was removed for MAGLDR libhtc_ril_wrapper.so and have made some updates: from old versions of Google Maps v5.6.0, Facebook v1.6.0, v2.0.3 Twitter, superuser v126.96.36.199, v2.3.2 binary su-EFGH.