Is there a tutorial for installing WM6.1?

[ripnridin]

I've successfully used the BuildOS to create and flash my own ROM but where is this new ROM that I created stored? What folder is it in? How can I get to it and reuse it like the older style pre-cooked ROMs floating around with the .nbf file type? I may not always be able to use BuildOS every time and I would like to save my stable ROM creations.

I'm sure this is obvious but I've read many threads and I must be missing something. Thanks.