I'd really recommend reading that thread I pointed to. There are a few methods in there that tell you how to use a custom image with a link to the Login button.
This post shows the URL to link to. It also explains a caveat that you can't use a New User or Login redirect with this method:
www.sourcecoast.com/forums/jfbconnect/jf...overrides?p=1#p24910
Alternatively, you can use the 4 lines of PHP in this post, along with the correction 2 posts below it. This method allows you to have the redirections enabled, but obviously is a little more complex:
www.sourcecoast.com/forums/jfbconnect/jf...overrides?p=1#p24932
We're planning to make this as simple as JFBConnect in a future (hopefully the next v1.3) release. Until then, it just takes a few lines of code.
Hope that helps,
Alex