sub form on click of a button on a form

Hi Metastorm experts,

I have a requirement where for a given folder (incident in a incident management process) i need to add email addresses of users who need to be aware of any updates on the folder(incident)

based on my understanding of the logic behind this there should be a possibility to pop up subforms on click of a button on a given form.

These sub form should display data of all the email addresses that have been added so far(if any) and should have a list of all available email addresses that can be added.

on click of done button on this sub form of the main folder this information should be stored in link with the main folder (incident) so that the user can add more emails or remove previously added emails.

I hope i made sense while explaining the requirement.

Please let me know if this is possible

Thanks and Regards

Kuntal