PHP Expert Needed!

I'm using interspire email marketer application for all of my email marketing efforts.. It needs a small modification to work the way I want it too. Interspire has what they call triggers, which allow you to make things easier and more automated... So when a certain action happens, it results in something. Interspire email marketer already comes with 4 or 5 different triggers.. Here's a complete demo of the program -->[login to view URL] To view the triggers, simply go to the autoresponder tab and a dropdown menu will appear which says view triggers.. They have triggers based on dates, links being clicked, etc.. For instance, if someone clicks a specified link you can set the action for what happens (whether you want to add the contact to an additional list or remove them from a list.) But the lack a subscription trigger, which would do this For example, I have setup 3 different contact email lists.. when someone opts into the first list, they will then get sent to the 2nd list.. After they optin to the 2nd contact list, they should automatically be unsubscribed from the 1st list.. That would be a subscription type trigger, which interspire doesn't come with.