Add option to phone log context menu - Android 2.0

Question

Hello,

I would like to program an application for Android that when installed would add an item to the context menu that pops up when you long-press on a call record in the call log tab in the built-in contacts program. Is this possible?

If so, any links that could point me in the right direction for the required code to add my option to that menu?

Thanks! Renee