Cisco Catalyst 4000-series switch configuration (CatOS and/or IOS)

I'm going to be undertaking a project to replace an End-of-Support Cisco Catalyst 4006 switch with a new 4506. I'll be gaining access to the 4006 configuration mid-next week, but wanted to get a heads-up on it beforehand.  My questions:

1) Did the 4006 require configuration through the CatOS, as well as the IOS (for the L3 side), as did the earlier Cat 6000's before "Native IOS" became an option?  If the CatOS is required, could the entire switch be managed via the CatOS?

2) Same questions for the 4506.  (Also, is it possible the manage the 4506 solely through a "Native IOS", such as the 65xx-series?)

Want to plan the transition of the configurations as much ahead as possible...

Thanks!