[HELP!] Replacing stock dialler/phonebook with AOSP versions - Xperia Arc Themes and Apps

Dev help required!
I am creating my own AOSP theme based on stock 587. I've managed to find an AOSP-like SystemUI and lock screen which works fine. I've replaced the calendar, calculator, camera, messaging. No problems.
But now I'm trying to replace the stock dialler/phonebook. I've taken the following files from JJs Hybrid ROM:
Contacts.apk
ContactsStorage.apk
Phone.apk
TelephonyProvider.apk
And copied them to system/app (changing permissions obv.)
I then removed the following stock files from system/app:
PhoneBook.apk
SemcContactsStorage.apk
SemcPhone.apk
SemcTelephonyProvicer.apk
But it doesn't work. When I reboot I get no cellphone signal, Messaging crashes and there is no Phone or People apps in the app drawer. I've tried wiping Dalvik/Cache, and tried renaming Phone.apk and TelephonyProvider.apk to Semc*.apk. Nothing works and the result is always the same. I even tried the same files from Omega 3.3 but it still doesn't work.
I must be missing something here - perhaps there is a framework file I need?
Can anyone help me? I would be very grateful!

---

You need to decompile and edit each one of these files to make them work with Sony framework, and probably edit framework itself, much like jjdoctor did for his hybrid ROM.
Also, you get no signal because SemcPhone.apk cannot be replaced, just edited.
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