Well I searched for this and couldn't find it...maybe I missed it some where
I'm almost positive this has been posted before...anyway
On phones like the HTC Kaiser or TP (Raphael) if you use a phone call recording software like Vito Audio Notes Touch or Resco Audio Recorder the software records only the microphone (it is in some countrys a law) - with this cab you can record both - the mic device and the audio out (phone) device. different than the "in call recorder" app this just enables the existing software if you have it.
it basically edits
[HKEY_LOCAL_MACHINE\Software\HTC\AUDIOGAIN]
"AUDIO_DEBUG_FLAG"=dword:00000040
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\RIL]
"RingingAddressId"=dword:00000000
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\WaveDev]
"VocRecPath"=dword:00000002
EDIT: Now there is a new cab combining 2 way recording plus the incall enable edit from pocketnow.com to enable BOTH sides to be recorded clearly from the dialer menu after a call has been established. It does not affect the ability to use a 3rd party app if you want, just gives you extra ease so you dont have to load any new programs up when you are in a call. Install the following cab to device memory, then once a call has been established just goto the dialer menu and select record. It will record in .wav format and save the recording to the Device\My Documents\Notes folder.
Im pretty sure this is posted more than once on XDA
OP
http://forum.xda-developers.com/showthread.php?t=493118