Re: using graphics I have purchased for background etc...
Bravenet is not prescriptive about what software you use to create your site and as well as their own two very different on-line editors let you use any commercially available site building software. So, if you need step by step instructions you must tell us what you are using.
The first step is to get the graphics onto the Bravenet server so they can be used. Log into your account, select web hosting then select File Manager and use the utilities there to upload.