For those that may be wondering about my end of it... I never could get it to work for some reason. I'm running 1.3.8 (or whatever the newest one is- I think it's that) and I couldn't get it to work even on a fresh install that had no mods anywhere. No idea why. I'm sure there's something somewhere that I don't know about, but who knows. I even made sure everything had the right CHMOD. Anyway, if anyone else has that problem, here's how I solved it:
When creating the Option Name that will essentially need the popup (or if it's already created, just edit it) I put a link in the comments section of it that says View Examples. See this page for an example of what I'm talking about: http://accessory-avenue.com/hbhcatalog/index.php?main_page=product_info&cPath=9_36&products_id=66
It works, but there are a couple of things about it:
1. The character limit for the comments area isn't that much, so the href link needs to be somewhat short, along with the wording you choose for your actual link.
2. For some reason, the comments section does NOT like quotation marks, so I just left them out. Write your link like you normally would but without the quotation marks.
3. Unfortunately, between reason 1. and 2., I couldn't get javascript to work, so I couldn't do a popup that way. I just had to use target=_blank.
4. Since you've used this space for the link and the character limit isn't that much, you don't really have room to write an actual comment along with your link if you need one, which kind of sucks.
BUT... it solved my problem, since this awesome mod wouldn't work for me, for some strange reason.