I'm trying to make a backup of a directory tree on Solaris 8. I'm doing this with my own ID, not root. The problem I am running into is when I extract the archive, all files are owned by me and the group is my default group. The man page lists this as the default behavior when executed by a non-root user.

Are there any options that I can use to override this behavior (to create the files with their original owners and groups)? If not, are there any other tools available with Solaris that would allow me to accomplish this?

You cannot take preserve certain permissions (such as root) as a non root user. There are numerous security reasons for this limitation for non-privileged users in a multi-user enviroment such as UNIX.