Hi Stacy,
There isn't a built-in way to do that, but you can construct a link that will launch the Slideshow and put that in your Post or Page. Here's the code with some comments:
<a href="javascript:PicLensLite.start({feedUrl:'http://smashly.net/wp-content/plugins/photosmash-galleries/bwbps-media-rss.php?layout=media_rss&id=1&gallery_type=0&tags=&thumb_height=125&thumb_width=125&no_pagination=1&no_form=true&no_gallery_header=true'});">Start Slideshow</a>
You'll need to change 2 things:
1) Change http://smashly.net to http://your-website.com
2) Change &id=1 to &id= whatever your gallery id is
You can add that little image back in if you want...here's the code:
<img src="http://lite.piclens.com/images/PicLensButton.png" alt="PicLens" width="16" height="12" border="0" align="absmiddle">
Just put it in after Start Slideshow.
If you want to show the Add Photos link, you'll need to do a shortcode like this:
[photosmash id=# no_gallery=true form=std]
Where # is your gallery ID.
Hope that helps,
Byron