I can get one of the popup engines to work on Firefox and NOT on Internet Explorer or I can get one to work on Internet Explorer but not on Firefox so my simple question is which popup engine (if any) will work on both?  What do I have to do to tweak them to get them to work on both?

Lytebox seems to work in both, but it has that little problem with the close button (doesn't appear).  If you follow the advice elsewhere in this form for how to fix that problem, (insert a '/' in front of a line of code in the jwsigpro_engine.php file, then IE7 stops working.

Anyone have any ideas?

Hi my friends!

In this case, I really need a direct link to the gallery to check out the issue
and what other code is running with the code of SIG Pro.

Those popup engines are based on scripts already published from others coders
that state that the scripts work both the browser.

As you can see, at our demo page, the sig pro works fine both the browsers
and this is the reason I need to see your page, to understand what happen.

Thank you!