Do movie recording with INTERNAL SYSTEM AUDIO [soundflower doesnt help in this case]

Question

Hi, I used to use a screen capturing program called Snapz Pro X. What I liked to do was record myself playing guitar / singing etc. I had my audio come from Logic during the capture so I could have effects on the mic as well as have multiple tracks. I basically opened up photobooth and screen captured the video from there, and used the audio capture to get the Logic audio. For some reason Snapzpro won't let me record internal systme audio anymore so I tried to switch to something else.
I see on this new quicktime you can record video similar to photobooth. When I go to the settings, I only see you can choose microphone. You cant capture system audio. So I downloaded soundflower to re route it. When I do a video record and play something like iTunes it works in the render, but I cant hear the music playing as it is in the recording process. This is the main problem for me.
I want to use soundflower to be able to record whatever audio is coming out of Logic Pro and just use Quicktimes isight for the video. If I change my Logic pro pref in audio output to soundflower and record it works BUT you cant hear audio WHILE recording doing this.
So I basically cant hear anything while recording which defeats the purpose. Keep in mind im not recording anything in logic at all. Im just capturing the audio from the program.
How can I record in a program like photobooth or quicktime for the video part and then be able to have the captured audio from logic pro in it?
And by the way, I am not interested in recording separate things and then combining them in post. I want something quick and easy I can do right on the fly.
Thanks

Answer 1

I realized why Snapz Pro audio isnt working now. I just recently got an audio interface, the "Duet 2" from Apogee. I use it to plug in microphones and guitars into my computer.
I just did a test with the in and outputs set to the mbp and the audio worked fine. When I plugged in my interface and tried to capture audio with Snapz Pro, it crashes everytime. I guess it just can't work together.
Screen capturing the isight window is kind of a crumby process to do what I want to do.
If anyone can figure out a way to record video directly from quicktime or photobooth and use the soundflower audio for logic please let me know...it seems like a better process
Thanks