Most of it is addon specific. For example, with Xperl you will have to copy .lua files from one character to the next in your WTF->Account folder. You may be able to import in templates that you have saved, but I am not sure how to do this. It works this way for most addons so XPerl may be a bad example. I know it works this way for VuhDo. I use a program by Microsoft called SyncToy. It makes this process simple.