I tried that, but it is not quite what I was aiming for. I want to have the fields for the specific plan available at registration. And to access the registration for that plan I am using the url suggested:
index.php?option=com_comprofiler&task=pluginclass&plugin=cbpaidsubscriptions&do=displayplans&plans=1
But, when I do that, I see the radio button for the plan. I'd like to hide that as subscribers are not going to be aware that they are part of a "plan". And at the moment, there are no other "plans".
Thanks.
Ben