Adam,
No go on that DLL, it is exactly the same as what I am currently using. So do you have a FAQ on this issue? What's going on?
Funny story (I think) I called 1&1 and mentioned I'm trying to use a 3rd-party DLL. The phone supporter said in a shaky voice, "You are installing d.l.l.?" Oh, I knew I was in SERIOUS trouble.
Here is what 1&1 claim they are restricting. Adam, will any of these stop me from using DotNetGallery?
http://faq.1and1.com/scripting_languages_supported/asp_net/14.html