Quote - Use save as, start with filename 01, and it will do the sequentailly bit for you automatically.

Ahhhh - I could have used that yesterday.  Was working on a scene and was just saving it by one name.  I now wish I could get back into an earlier version of the file (since I added an element which now makes the file hang when I try and open it) I'm going to have to start from scratch on this project and I'll be using your tip as I go ;)