Hi Lucas,
After a long time seeing a message from you. Looks like ur busy these days.
Here is a way which you can try:
If you have to customize the pop-up dialog, then make a Z copy of the App config and in the app config then you can can see the Dailog Box in the left side, may be there you should be able to add/customize/create a custom config for ur dialog box.
Regards,
Yugandhar Reddy