PowerPath 5.2 and 5.2 SP1 have been removed from Partner and customer view due to severe issues with those versions of PowerPath.  If you are planning testing upgrading from PowerPath 5.2 or 5.2 SP1 to a later version and require the software it can be made available to you through a Chat session or a SR. However the version should not be used in a Production Environment - PowerPath 5.3 SP1 or 5.5 should be used.  What is more unusual from my point of view is the fact that you say PowerPath 5.5.1 wont support your 2008 R2 install. Maybe you could expand a bit on that please?  Sam Claret TSEIII
 Does anybody know where I can download PowerPath 5.2 from?  I am trying to connect an FC host that is running Server 2008 R2 and my version of 5.5.1 x64 will not support it.
PowerPath 5.2 Download Location