I got my custom CSS template working with SBI! Here what i did.
1. Name your css template txtnew.css (SBI! requires you to name the you CSS file with this name). You can either make you CSS template or get a free template from a free template site.
2. In the header section your HTML page add the following code
HTML Code:
<style type="text/css">
@import url("support-files/txtnew.css");
</style>
3. Simply upload the css using "Upload Your own HTML" along with the HTML pages using it.
You don't have to worry about the naming conventions of the class or id names in your CSS file. You can name them what ever you like.