Downgrade SQL Server 2012 Edition (Ent to Std) with SSIS on same Server

We got SQL Server 2012 with SSIS running on Enterprise Edition and need to downgrade it to Standard Edition. We need to uninstall SQL Ent and re-install Standard Edition.

I am looking for instruction around backup, restore and post-testing of SSIS part.

The document "Backup, Restore, and Move the SSIS Catalog" has instruction but not sure if I need to follow exact same instructions for SQL 2012 ? 

I found another article where the guy the mentioned the easiest way is

1. Back up the SSIS Database on Old Server
2. Create an SSIS catalog on the new server.
3. Restore the SSIS catalog database from the old server over the newly created catalog.
4. Restore the original password use to create the catalog on the old server.

Can anyone provide any feedback or any step-by-step instructions for SSIS.