CentOS - Mar 2012 - Using NFSv3 and NFSv4 at the same time with CentOS6

Hi all,

 I have two centos6.2 servers acting as a nfs servers (nfsv3 for now).
Due to some security requeriments, I need to share some folders using
nfsv4 (with kerberos auth), but I have a doubt. Is it possible to
serve shared folters using nfsv3 and nfsv4 (with kerberos auth) at the
same time in the same server with centos6??

 Nfsv3 is used to serve storage for three ESXi servers (and these ones
only supports nfsv3). How can I do it??

Thanks.