Hey fish, I've been trying to swap out the dialer without luck. I was trying to replace the Phone.apk and Contacts.apk and TelephonyProvider.apk in the system.ext2 but they seem to be dependent on other files in the system.ext2.
I tried replacing them with the Cyanogen dialer *.apks (
[MOD] Contacts.apk & Phone.apk w/ 315x315 callerID ( Eclair 2.1, Froyo AOSP, CM )) but no luck either. I thought it would work since that link mentioned that the packages are compatible with Froyo 2.2.1 AOSP, on which FRX04 is based. It's probably not working because the apks are cross-compiled for another processor different than the one on our TP2.
Oh well, I'll stop for now until I get some time to work more on it.