Yes!
First, set up your homepage and a galleries page so that your galleries are suppressed on your homepage and shown on a page called "galleries". Instructions are in this tutorial - http://dgrin.smugmug.com/gallery/2160039.
If you want a navbar to show on all pages but your homepage, follow the navbar instructions in the tutorial above, then add a
.homepage #navbar {
display: none;
}
Change #navbar to whatever name you used if you chose to call it something else.
Load the photo you want to use for your homepage into a gallery. Set that gallery to unlisted (so it will only show if explicitly referenced).
Use an <img src= statement in your bio box to display the photo. You can pick up the URL in the share photos page.
Here's an example of the code you will use in your bio box:
<html>
<img src="your photo url here">
<br/><br/>
<a href="/galleries">Enter here</a>
</html>
If you need more help, please post the url for your site so the helpers here can really help. I'd recommend adding it to your signature so that it is always available. Click You! in the navbar above, then Edit Signature.
--- Denise