Go to http://ilovemyaffiliates.com/plr-programs and click either link.
Scroll down until you see the graphics that are available.
There's a really informative video that Nicole recorded that explains what you need to do.
While the video is from 2009 when Nicole was Jimmy Dean's affiliate manager and the example is for a PDF, the premise is basically the same for a graphic.
The instruction for the PDF upload starts around 2:10 in the video and for the graphic at 6:52.
Where she talks about linking the PDF to the graphic, substitute your affiliate link for the PDF link.