EPM EHP4 to EHP5

Hi Experts,

We implemented Performance Management using EHP4 (still in Web Dynpro for ABAP) in ESS/MSS. Now we are planning to implement all other ESS/MSS functionalities using EHP5. My questions is How do we deploy EHP5 in Netweaver portal? How do I migrate or upgrade Performance Management to EHP5? Please advice.

Thanks

Francis