I've agree to remake a friend's blog and since I use this Atahualpa awesome-est-theme-ever for all my other personal blogs I'm going to use it for his. But I need to leave his current theme untouched until it's ready. How can I do this? I can't figure out how to preview a theme without having first having selected it for the blog and it's going to take quite a bit of time and previewing, if my experience using the themes on my other sites is any indicator. There's got to be a way, right? Something I just don't know about yet? Would appreciate any advice.