A couple of things I should mention:
1. When I went to "apply Style 4", there was none. There was no listing_3.html template on the server or template admin. When I asked support where it was, they put it on the server, then acted like it was there all along. Not the first time updated files have not been installed, but would like to know if anyone else has the same experience.
2. you can't style the tabs, unless you delete their style sheet and link to a new one. the style sheet is assets/common/js
/tabs.css but the /common folder is locked and you can't edit anything in it.
i downloaded their style sheet, copied it, made changes and uploaded it to the css directory, then deleted the reference to the locked stylesheet and replaced it with a link to the one that i altered.
don't know why they chose to put the css in a locked directory. text in bold navy blue, sans serif doesn't really go well with our site.
3. the layout of listing_3.html has a lot of wasted space, and pushes the tabs way below the fold. i altered the html to be more like style 2 which is more compact. going to try to attach the file for anyone else to use with the cavaet that it has not been flushed out using all of the different scenarios with the cart e.g. multiple shipping, options, etc. also, as previously mentioned, the link to the standard style sheet has been commented out but can easily be uncommented. file is listing_5.html so style selection would be style 6.