If you are using Yahoo! Messenger for calling someone now you can record your conversations with. Hot Recorder for VoIP . It is also works with Skype, AIM, Google Talk and other VoIP programs.
It comes with Skype as the default program for recording calls from, to change it to Yahoo! Messenger just right click on the Hot Recorder icon in the system tray, select “Activate HotRecorder for…” and then choose Yahoo! Messenger.
Price
It is free if your recording time is only for 2 minutes for longer records program price is $15.
You can taste it with making a talk under 2 minutes and if you like it you can buy it 