Well that's just cheating (shakes head disapprovingly)!
For that matter, you can do that with items, skills, and spells.
You know, there's an even easier way if you're restarting: Just edit WIFES.TXT and remove all the kids from the wife's baby list except for the 4 that you want! Remember, you didn't hear that from me, though...
Your way is a good way to try out different kids if you're already in game though
, but this all sounds a bit like Gattaca to me...
/C\/C\
P.S. Who are your wife kid dream teams?
P.P.S. Which kids have your favorite pictures? I always liked Shiva, Solmyr, Jenova, Adelaide, and Sandro.