Hi Scippy,
The Vendors and Banners modules are very old module and believe it or not they haven't changed much (if at all!) in the past decade. They are not great modules, but they work as advertised. We have clients using it and it works just fine for them.
I haven't seem anything better than those yet, but I found this
http://store.dnnsoftware.com/home/p...manager-61 which is a bot old. I suggest to stick to what DNN has out of the box to get you started.
If you need to go beyond that, you may want to consider services like
http://www.adbutler.com - They have the entire management interface and you just add a script to your site. There are many others.
Sincerely,
Andy