I’m not asking about how the plugins interact, I’m just wondering if there is a standard plugin procedure that I’m not following, that would allow the scripts to be called. Why are they being commented out automatically in the head? Does WordPress need certain things to be in place for it to work?

If I can get some help getting this code to work, then I can carry on with creating the plugin myself.

I did ask them, they said it would cost serious money to make the changes I’m trying to implement. Hence the reason why I’m doing this myself.

I did read the code, I was hoping that I was wrong. No one here has access to that commercial code (nor do we want access) so we can’t tell you what it is doing to interfere with your add_action.

For pro or commercial product support please contact the author directly on their site. This includes any pre-sales topics as well.

As the author is aware, commercial products are not supported in these forums. I am sure they will have no problem supporting you there.