Yes, I read the howto about PHP integration. However, I may have missed some key information due to my "newbieness" with PHP...
After your post I did a fresh installation on my test server (thanks to Xampp!) and it appear that the language selection in IE is now fixed. I have no clue how I screwed it up but the fact that it was fixed through a fresh installation indicates that I did something wrong.
With respect to PHP inclusion, now that I can test offline using Xampp, I may give another try to building a full PHP/pseudo-frames site. Eventually...
In my first implementation, I did not change the config.php file, but made one little change to the index.php (in the root TWG folder) to remove the icon when a high-speed connection is detected (it will only show for slow connections).
I also made a few changes to the style.css to to change the fonts and switch their size to "em" instead of "px"). The my_styles.css file did not seem to allow this.
As you note, the style.css of TWG overwrote my own "layout.css" in the root folder. To fix this, I made sure there were no general classes defined in either of the CSS files:
/* the colors of the links */
td a:link { color:#000000; text-decoration: none; }
td a:visited { color:#000000; text-decoration:none; }
td a:hover { color:#D85D5D; text-decoration:none; }
td a:active { color:#D85D5D; text-decoration:none; }
td a:focus { color:#D85D5D; text-decoration:none; }
I did the same in my own "layout.css" file to ensure non-TWG styles did not overwrite TWG section styles. As a result, the browser is forced to apply the styles only to specified <divs> (or areas) of the site.
About the Admin link opening in an iframe, through further experimentations, and even after a fresh installation, I found that the problem arises with "Show public admin link?" set to false and "Show login?" set to true. With these options, the Admin link appears only after I log in, but loads in that same login frame instead of a new window. If I set the "Show public admin link?" to true (default setting), it correctly loads in a new window, but the Admin link is always shown. I thought this was not be very useful because I don't want any visitor to access the administration section.
Thanks for your interest in our work and for taking the time to respond. And again, this Tiny Web Gallery rocks!
J-S.