Help: Image in Grid cell based on cell value

I'm not sure if this can be done, but I thought I would ask.

If I have a cell value of "green" (read in from an XML source) how would I display the image "green.gif" in that cell?

If that is possible, would love the help. And, while I'm at it, I'd need that green.gif image to be a link to a PDF (that is stored in another cell) - thing is, I'd need to append to the front of that PDF file the http path.

So, it would be something like:
Row 1/Column 5: carl.pdf
Row 1/Column 6: green

I'd need either Row 1/Column 5 (or Column 6 - it doesn't matter) to be displaced as a green.gif that would link to http://www.mydomain.com/carl.pdf when someone clicks on the green.gif (which is simply a green filled in circle).

Any thoughts? It would greatly help.

If anyone needs a visual example of what I'm trying to do, I can provide a link to a website where I'm doing it through an XML transform.

Thanks, Carl