to Jimmy: the 1st picture shows how to connect the Pro-Wave inside modular: Midi Out to Midi in, and L-R OUTs to Mod's Outputs 1 and 2 (for ex.)
Now, for adding another oscillator, you have a few options, but first, connect its Freq input to Pro-Wav's MVC out. Then you have to decide where you want this oscillator to go.
In picture 2, because I want the oscillator to pass through the internal filter, what I did, was connect the Flexor Osc output to the EXT input of Pro-Wave. Then, in the Mixer, you have the option to select an external input signal instead of the Noise generator, which brings this third oscillator to be side by side with OSC A and B, and being processed by the same filters, envelopes and FX. If you want more sound sources, just add a mixer and mix the various signals into the EXT IN, as in pic. 3.
You can also take a signal from the output of the mixer, or the filter, and mix it outside with the oscillators, or route it to other filters for serial filtering. However, there are only two inputs for audio on the pro-wave: EXT and AMP. EXT goes to the mixer, pre filter, and AMP enters right before the FX section, post amplifier envelope, so if you want to shape the amp's contour, you'll need to add VCA modules, at least for external Oscs. This could be avoided by the inclusion of a patch input after the filter, but before the Amp EG, but it's OK as it is, if you're loading the modular, you'll have to learn the modular ways sooner or later, anyway

Here's a zip (actually a rar) with the "Shameless" preset for Pro-Wave and the .dev for modular. This is better than posting another picture, but you'll need SpaceF's Blackbox and FlexorIII to open this dev (not the preset, tho, it's all Pro-Wave with Shroomz Tube Warmer).
Thanks!
T