No problem at all.
I did forget to mention a few things.
Once all of the above is done and PT is set to use the aggregate device, you need to go into protools and go to Setup ->IO.
Go to the input tab. Select all paths and delete them (don't worry..it's fine.)
Now click default. PT should repopulate your list with some inputs.
Go to the output tab. Select all paths, and delete those too.
Click default...same thing will happen.
Now sadly, Protools will just list your IO as output 1+2, output 3+4 etc etc. It wont inherit the names.
You'll need to reference your aggregate device to see which is which.
Basically, one set of outputs will give you sound, and another set will make the meters move in quicktime, if it's set to receive from soundflower.
Your PT mix window should be similar to
this.
The sends are all post fader, which is the standard setting, and have been set to unity.