Sounds like the only thing for you to do is buy a vB subscription and find out
I will say that on the majority of mods I have downloaded for my forum, they either had no screenshots, or the screenshots didn't do much to clarify what they really were. My recommendation is to look through the mods and PM the Coder. Don't expect to receive a response back because a lot of coders only answer questions in their threads so make sure you have an intriguing message title.