Removing applications from an android build

[Karthik]

Hi-
I would like to know how I can build a platform version that does NOT
contain certain apps (say Phone or other apps). I see that there are
certain make files such as AndroidProducts.mk and core.mk in build/
target/product/. Is it one of these files that I will need to modify
or are there others?
Also, if an app that handles Intents, how will removal of the app
affect apps that request these intents? Should some other "intent
registry" be modified to handle this?
Rgds