ok do this:

create a midi track in Live and assign a channel number to it, make it channel 1 as an example and then assign your Modular's bank A to channel 1.

Now route the audio outputs of your modular into your soundcard's audio input, or through your mixer or whatever (dont know your setup).

Now create an audio track in Live and change the input to "external in" or whatever the name is.

Now sequence something in the midi track. Your Modular should be making noise and you should be hearing it. When you're ready to record, arm the audio input track and launch the scene. As you're recording, tweak the shit out of your Nord's front panel knobs and just keep recording. Then hit stop.

Now you have everything recorded as a clip (or pattern in the oldschool way of things) and you can chop up the good bits and throw them around your track.

If something didn't work or you're not getting sound consult your Live manual. It's all in there.