Here are the simple steps to install Telerik's RadControls in DotNetNuke 4.9.x. The key point to remember is that the skin objects are DNN wrappers that make use of the Telerik modules, which means the Modules upload must be done first before uploading the Skin objects
A common question I get asked is "What is a website and what is a web application?" or "What is the difference between a website and a web application?". So I thought I'd take this opportunity to share my thoughts.