How to upgrade PowerPath on Microsoft Cluster 2008

hi

Does any one know how to upgrade powerpath on  Microsoft Cluster 2008 from 5.5 to 5.7.4 , can i upgrade or do i need to uninstall the old version 5.5?

and does any one can tell me the steps to do that, because i found this.

1:Turn off all other cluster nodes completely. )-------> it means all nodes in the cluster????

2: Disable the Cluster Service on the node that is still up and will be upgraded. (Do not stop the service as it will then be re-activated after a reboot. Disable it). Done in services, via Computer Management.

3: Disable cluster disk driver. Done in device manager. Click view, select: show hidden devices. ------windows guy  perform thist??

Expand: Non-Plug and Play Drivers. Disable: Clusdisk.

4: Reboot the host.

5: Upgrade PowerPath to the version needed

6: Put Cluster service back in Automatic mode

7: Enable cluster disk driver

8: Reboot the Host

9: Verify all cluster disk resources come online in cluster admin

Best Regards