I use the Chaos tool suite module for modal popup in Drupal 7; I am unable to open popup from within a popup using ctools. Can it be done using ctools, or is there any better popup modal module in Drupal 7 which can do this? (I am using forms in popups and not only pages.)
Could the Colorbox module be useful for you?
Colorbox is a light-weight, customizable lightbox plugin for jQuery 1.3 through 1.6. This module allows for integration of Colorbox into Drupal.