Link the image to a different node or link.

I've installed the Nivo-slider with succes, great module. I've an image, a link and a description, but how do I change that when you click on a slide (image) you're not directed to its full node, but to it's link field?

I've some pages or other websites I want to promote on my frontpage, so when you click on a slide you should be redirected to the link given, not the full node.

Thanks in advance!