Need to upgrade and move Manager console to new server

We have one primary and 3 replication partner.  It is running SEP 11.0.6MP1 with embedded database in Windows 2003 server

Want to upgrade to SEP 12.1.RU2, also want to move to new server which is running in Windows 2008 R2 and also want to upgrade the database from embedded SQL 2008

Like to know the detail steps to proceed further to complete all 3 activity