I just wanted to conform for exchange 2003 cluster setup

Step 1) windows 200
Step 2) IIS SMTP, NNTP, WWW and as
Step 3) cluster service
Step 4) create network name and IP
Step 5) comclust.exe ( not sure for w2k3
Step 6) install exchange 2003 on first nod
Step 7) add system attendant to the group and it will bring up all the exchange service
Step 8) install exchange 2003 on second node, completed
Step 9) fail over to second nod
Step 10) fail back.

Not sure about step # 5 comclust.exe ? that how it was the step for w2k and e2k.
did i miss anything