Adding on to this, most babyz have their belly and knees set to non-rotate so they can have graphic tees and cute socks!
[No Texture Rotate] 4 71 72
is what I have on all my hexies. If you give them .bmp hair you would also want to add all the hair addballz, which usually start at 138 and go up from there (the first addball you add to the baby will always be 138 and I think a lot of us do hair addballz first).
Don't forget to put any non-rotate code in both the Baby and Adult bits of the file!