Hi Lineman,

You should check out the PowerPath 5.3 installation and configuration guide available from PowerLink: Navigate as follows:
Home > Support > Technical Documentation and Advisories > Software ~ P-R ~ Documentation > PowerPath Family > PowerPath Multipathing > Installation/Configuration

Here is the direct link to the document: http://tinyurl.com/cxzyj9

The extra steps involved in the upgrade are outlined on page 32-33:

If a PowerPath device is the boot device

If your previous PowerPath version uses a PowerPath device as the boot device, disable multipathing to the root device before upgrading.
To disable multipathing to the root device:
1. Run pprootdev off.
2. Restart the host

Perform PowerPath upgrade as per page 29-30

After upgrading, reenable multipathing to the root device:
1. Run pprootdev on.
2. Restart the host.

Thanks, I actually found this document yesterday. I appreciate your help and response.