How to upgrade the interfaces when we upgrading the sap from 4.6c to ECC6.0
we are going for the upgrade from 4.6c to ECC6.0
actually we are using n number of interfaces like webmethods, informatica powercenter, ALE, EDI....
powercenter was created some programs in SAP R/3, when we are upgrading from 4.6c to ECC6.0, what kind of issues we will face regarding this informatica. what is strategy we have to follow to upgrade this informatica in SAP, if anyone have the documents regarding informatica powercenter please help me and guide me
if anyone have documents regarding this interfaces upgradation or procedures bestpractices, common issues please forward me