You could use one of the clamp-on style DT jigs. (Katie or Gifkins for instance) I know the Katie sells forks so that you can cut box fingers instead of the DTs.
Thanks, I was unable to see the replies before now.
I took a look at the jigs that were suggested and came across a Kehoe Jig demo on Charles Neil's site. It looks interesting as it can be placed and clamped conveniently to the work. Does anyone have any practical experience using the Kehoe jig?
I was hoping that I could make a simple jig since this may be a one time project. I think gav's suggestion looks like a great candidate.
Adapting a Porter Cable box joint finger template sounds like a great idea.
Bob, in your reply you attached a link that shows a jig setup that is exactly what I need.
Are plans available for these jigs?
Thanks to all for the great input and suggestions. This is the 1st time I posted a question on a forum and the help has been great.