In the previous version of Shadowbox I was able to hack in a way to get all content to open in an iframe. The problem is that if the url comes in the forum (site.com/my/url/) without a .php at the it defaults to unsupported.
With version 2...I'm having a very difficult time trying to do this again. Is it part of the standard options perhaps this time around?
I've tried setting it directly via urls...been reading the code as well. But is there a better way?