sorting with number late in name

[Dr. Hawkins]

Now that I've hit ten numbered items, I'm having an issue with
maintenance routines.

If I have the items

  p13_1.07
  p13_1.08
  p13_2.04
  p13_10.01

I want them to sort in that order.  However, the 10 will sort between
the 1s and 2s.

Is there a "decent" way to do this without a custom function?

All I'm coming up with so far is a script that looks for a single
digit number and renames to put a 0 in front of it . . .

-- 
Dr. Richard E. Hawkins, Esq.
(702) 508-8462