Enhancement of EHP's

Hi,

Client is Planning to upgrade EHP1/EHP2/EHP3/EHP4/EHP5 from solution manager

So what i need to do any one can tell me like mandatory things to do for upgrading EHP's any idea.

My landscape details

i am using solution manager 4.0(7.0) [ Database MS-SQL SERVER 2005 Patch 4035 ]

kernel version 159

SAP versions 700

SAP_ABA 700 SAPKA70012

SAP_BASIS 700 SAPKB70012

ST 400 SAPKITL422

ST-PI 2008_1_700 SAPKITLRD1

SAP_BW 700 SAPKW70013

Landscape ( DEV, QAS , PRD )

kernel 221

SAP version 700

Component version SAP ECC 6.0

SAP_ABA SAPKA70013

SAP_BASIS SAPKB70013

Thanks & regards

Munna