Hi MV,

1) You'll need to edit the Custom layout...just remove this code from it:

<div class='bwbps_postlink_top_rt bwbps_postlink'>
			<a href='[post_url]' title='Visit image page.'>
				<img src='[plugin_url]/photosmash-galleries/images/post-out.png' />
			</a>
		</div>

Here's the tutorial on editing Custom Layouts: http://smashly.net/photosmash-galleries/how-to/create-custom-layouts/

2) To make it so that only Contributors can upload, here's a video that shows how to make it so Anyone can upload...just select the appropriate role in the dropdown. The video should get you started: http://smashly.net/photosmash-galleries/tutorials/getting-started-with-photosmash/

3) If you're wanting to add Captions to images that are already upload, you can do that in Photo Manager...just edit the gallery that contains the images. Add the caption and save

4) You can change the size of the thumbnails in Gallery Settings and then Resize the images...here's a video showing how: http://smashly.net/photosmash-galleries/tutorials/sizing-and-resizing-images/

HOpe that helps,
Byron