Dawg,
I believe both you and your father-in-law can achieve what you want in the new pond. Read through all the previous posts concerning stocking rates, predator-prey relationships, ...
The information your looking for has been, and continues to be discussed in this forum. Use the search feature in the upper right hand corner, and type in your desired subject. Lots of great info.
Lastly remember, it is your daddy-in-laws pond. If he inisists on a catfish pond, pat yourself on the back for marrying so well, and learn to skin ya' a catfish.
Welcome to pond boss.
P.