If you use ufs & ufsretore for the procedure you should not need to explicitly specify any files. This would be one typical approache to cloning a system. However it appears that you are not cloning, but duplicating a system, in which case you probably want everything listsed at the bottom of the man page for sys_unconfig that you have not already included.
i recomend using flasharchive option from solaris. the flash image can be installed during boot from cd or dvd media from solaris.
read the man page for "flarcreate".