You have mirrored UFS filesystems and you want to clone the system.
How much Solaris experience do you have?
I have recently given extensive advice/assistance to another member wanting to clone a Solaris 9 system and this will equally apply to Solaris 10.
So read these threads first and post any questions you have. How easy this will be for you will depend on your prior knowledge.
In this order:
Ufsrestore
Ufsrestore on SunBlade 2500
Partition Sizes
Park yourself beside a coffee machine and keep reading. Search this forum for your further questions and post back here if you can't find the answers.