a rule acting onto a rule

Hi there, I recently discovered rules and I'm impressed on how powerful this module is.
Well I've already create a couple of rules and they work like a charm, but (there is always a "but") I need to do something that I don't know if it's possible, if so, I would need your advice to accomplish this, there we go.

I have a rule that react when a type of content is created.
The reaction is to send a mail to different email addresses.
I have created an action per mail address inside this rule because there is no way to send a bcc mail, so if you have all the mails at the same action, people that get the message can see all of the other mail addresses that the message is sent to.

Then I have a content type that gets some data when a user creates content with it:
mail:
activate (these are check boxes)

• yes
• no

So I would like to create a rule that react to this content, and the action would be create new action inside the previous rule with the data grasped from the content, actually the action would be conditioned by the yes/no question, if "yes" add a new action if "no" remove the action containing the "mail" data.

I hope I have explained myself.

thanks for your time.