Okay... I'm posting this for anyone who searches this topic (and for my own selfish purposes because I am going to want to reference this in the future).
Based on the helpful posts by scook and Bristol Jonesey I have figured out something VERY cool and fool proof to make this happen (and a generally cool way to manipulate Sonitus EQ)
For low/hi/band pass try the following (this creates a what I was asking for but reveals something very cool about Sonitus EQ).
1) In the fields under the graph set Bands 1, 2 and 3 to "Hiighpass" (using the dropdown). Set notes 4, 5 and 6 to "Lowpass".
2) In the "Freq" box for Bands 1, 2 and 3 set them all to the same number (double click to type in a value or copy paste a value from one box to anther). For each field be sure to press Enter (or the new value will not be accepted and no changes will occur).
3) Repeat this procedure in the "Q" fields using appropriate values for 1, 2 and 3 (just copy/paste one of the values into the the other two boxes pressing Enter each time just to make them equal values).
4) Using a different value (a higher value because this will be your lowpass filter) repeat the same procedure for Bands 4, 5 and 6 (Freq and Q).
Now the graph should look like what Bristol Jonesey posted (Nodes 1, 2 and 3 will be on top of each other and Nodes 4, 5 and 6 will be on top of each other creating a "bandpass" on the graph).
THIS is the thing I figured out...
In the graph section Left Click and drag around one set of the "stacked" nodes. So start with Nodes 1, 2 and three. This is like a "lasso" select. Now all three of those nodes are selected and you can drag all three around the graph. Dragging them left and right will move the high pass throughout he frequency range without screwing up the slope/curve. Of course the same can be done with the other three stacked nodes.
It seems the max Q you can set for a set of nodes before a resonance curve happens is 1.4 (edit: after some tests for the low pass the max seems to be 1.6 as shown in the images scook and Jonesey posted... you can go higher but as you bring the Freq down on the lowpass you eventually start getting a curve... just play with it, it's cool). Also screwing with the Q's (mixing and matching) results in different slopes as well as switching out the filter type for each band.
Anyway... I'm sure Sonitus EQ masters have a ton of other tricks but just figuring out that you can lasso select those stacked nodes (and they don't even have to be stacked) led to some awesome and useful happiness with this plug.
As I said... just posting for my own reference and maybe others exploring the intertubes will discover the losso joy I just have.
Thanks doods....