NexImage 5 Question

I have a NexImage 5 and I have a question about taking regular snapshots. Is there a way where you don't have to declare a filename for each snapshot? I'd like it to be like a regular camera where it gives a filename automatically. I take a lot of stills of the moon and I don't want to have to type in a filename for each picture.

See figure #7 in the PDF instructions below.

http://tinyurl.com/neximage