I installed this, but get an error message when I try to run.  

Server Error in '/CMS-Gallery' Application.

Could not load file or assembly 'DotNetNuke.HttpModules' or one of its dependencies. The system cannot find the file specified. 

etc.

I installed it from Arvixe hosting, and to the DNN 6.x website, but in its own folder.

How do I uninstall it?

How do I reinstall it so there is no error message?

How do I integrate it withinthe DNN site?

Thanks!