So easy!!, this extension is great. Easy to use and fast. I've tested in my website with Firefox, IE7 and..... it worked also in IE6!!!!. The best is that it comes with an .css file so, so easy to change. So in half an hour I changed all the style, colors, images. Great!!! Congratulations to the developers.
I only have one problem: after publising the plugin, it was written an error in the upper part of the content area (but the plugin worked good!). I solved this by including the following code in line 15 in file jwts.php
(cheers and sorry for my bad english)