Adapting 2001 Skeleton for four legs

[mpmmprod]

I put the 2001 Skeleton rig in my model because I didn't want to start from scratch, but my model is a turtle. Everything would be wonderful if I had foot targets for what used to be the hands. How can I make the hands into feet that have foot targets. Does anyone know of a tutorial for a rig with four legs or can someone please tell me how to make the 2001 Skeleton work for four legs?