I'm certainly not a code junkie, but I did get that piece to show up in my admin ,after some struggle, and I can tell you that the files are not in the right place. Take a look at the instructions, because you have to put things "exactly" where they tell you to put them; In this case, the file that puts the control in admin is not where it should be, and I know this because I ran into the same problem (yet I'm still not able to use it either).

(By the way, nice looking site!)

My issue is, I got it all in, uploaded a couple of images to use but never saw the slideshow appear. I've put custom HTML using the define pages editor, and wanted to know if I'm supposed to slip in some code somewhere in there because it won't show up. I'd post the site but I've pulled the ZX package because it wasn't working and was hoping to get some feed back before trying again...