Installing sp1 on SQL 2008 64 bit standard two node active passive clustering env

What are the correct steps to install SQL 2008 64 bit sp1? Say we have node 1 (active) and node 2 (passive)
1. On the passive node (#2) , install the sp1.
2. when step 1 is done, fail over from node 1 to node 2. install sp1 on node 1.
Is this correct? I don't have a testing cluster env to test the sp1 install so I need to know all the steps if I miss any.
Wingman

Yes that is the correct process.
Follow the MS KB : http://support.microsoft.com/kb/958734