the 3.1 styles are very different from the 3.0 styles.
there is no longer an imageset directory, so all of the image paths have to be changed, there are all the events in the html files for the extensions to use and I don't even know what else has changed.
by the way, I created a style based on the colors etc. of one of yours the other day but couldn't find you to ask about it.
I based the colors etc. on the old grande red style of yours.
you can see it here:
the layout and code is mainly based on this style: Modern-silver and I am having trouble getting all the responsive stuff to work right.