How can I install Android built from source on a bare device?
It won't just be a case of installing from the source, the internals of those phones are different enough from the internals of most Andoird phones that you'll have to port the OS, write hardware drivers and more.

This StackOverflow question Is it possible to port Android for a Symbian phone? goes into some of the work that would be needed to port Android to a Symbian device.