- There is an Android build-environment on pony in /d3/android/ . Clone your own copy - it's all git-based!
Building a system image documented pretty clearly on 
When "Building for Dream," make sure to update the provided local_manifest with the following line, instead of the default (2.6.25)
<project path="kernel" name="kernel/msm" revision="refs/heads/android-msm-2.6.27"/>
== Flashing a custom image Use fastboot like so:
./fastboot flash system path/to/system.img