[gguruusa]

In the kitchen, you get stock for WM6.1 by default if you don't choose something to override/add. So, for a dialer, you would get whatever is the stock dialer. For MMS, you would get nothing because that's not stock for WM6.1.

As to what you need from your ext rom, the answer is nothing. All the useful bits have been placed into the kitchen. We usually recommend people delete the contents of their ext rom when running a custom rom - stock ext rom contents wreck things if they happen to run, and you can use the partition for other things.