how do i change file name and location for call recording?

[Guest mmoalem]

hi there all - my rom is SS5.

i currently use the inbuilt call recording feature (pressing 'menu' once call connected, press record on the pop-up menu)

recording are currently saved on the root of the sdcard with a file name voicerecordingXXXXX.amr (Xs are digits)

I would like the file name to include time stamp caller number and if possible save it to a dedicated folder on the card rather than root but i cant find a way of changing the settings. can anyone help please?