Hi,
First thanks for this great contrib.
Have you gone thru your Products as Options project ?
For the moment, i'm using the last qtpro 4.6 and your last option types v2 together.
I don't know if I did it th right way, but what i just did is put a test on products_option_types, if it's equal to 0.
I use qtpro (since I only use it with this type of attributes) and for the other types I use your contrib.
Once again, i'm not sure that's the way to do it, but it's working good for me.
But I thought it could be interesting to explore this kind of solution until anything best is found.