Is there any way that I can avoid using 1433,1434 port on the clustered servers?

I have a active/passive (SQL1-active,SQL2-passive) cluster server and another active/passive cluster (SQL2-passive,SQL1-active).

(Its a Quassi active/active server)

I want to change all the sql server ports to other than 1433 and 1434.

Should I change in the registry
Localmachine-software-microsoft-mssqlserver-client-supersocketnetlib-tcp

or
Localmachine-software-microsoft-mssqlserver-mssqlserver-supersocketnetlib-tcpport

or
anywhere else?

Any suggestions are always welcome