Rollovers are working exactly as I want them to but when I click on the thumbnails it sends me to the top of the page. I have tried changing the rollover setting to also change the target image on click but I still get the same.
I found a solution to my problem (although it will add a bit more time to my work). I have added an anchor to the main image section and then a link to that anchor on each thumbnail. Seems to work ok.