Hi Hayashi,
You could firstly go to SAP Help Portal Sitemap with URL http://help.sap.com/sitemap/.
Then search for "SAP Supplier Relationship Management " in the sitemap.
SAP Supplier Relationship Management
SAP Enhancement Package 3 for SAP SRM 7.0
SAP Enhancement Package 2 for SAP SRM 7.0
SAP Enhancement Package 1 for SAP SRM 7.0
Earlier Releases
Go into the link of any release, you will find the area of Application Help - SAP Library easily.
And the path and content are now more structured and easy for SAP customers to locate.
Hope this could help you.
Regards,
Wendy