Hey guys, I'm newish to the CS, don't really know my way around it. All I've ever done was edit race stats/hair/etc and have placed a few very basic NPCs in the game world or made tree billboards with the render window. I don't know ANYTHING about landscape editing.

What I want to do is simple (I think). I want to add a terrain texture to certain areas along the Orange Road and around Bruma without having to replace/overwrite existing terrain textures. I also want to know how to add or remove grass from a specific region/group of cells so I don't have to replace/overwrite an existing grass texture and lose it in other parts of Cyrodiil.

Are there any walkthroughs anyone can point me toward that would explain this process under the assumption that the user is a complete idiot and CS noob? I'm really reluctant to delve into the CS at all but it's 110% necessary for a mod I'm working on, unfortunately. Would the Construction Set Extender make this any easier as well?