Hi everybody!

I have ASA5520 version 8.2(1) with AIP-SSM-20 module

and I want to upgrade AIP-SSM-20 software from version 6.1(3)E3 to 7.0(2)E4

I go to the download site and see the following list:

Intrusion Prevention System (IPS) Recovery Software:

• IPS-K9-r-1.1-a-7.0-2-E4.pkg

        Release Date: 29/Mar/2010

        IPS Recovery Image File

Intrusion Prevention System (IPS) Signature Updates:

• IPS-sig-S481-req-E4.pkg
  

        Release Date: 31/Mar/2010

        E4 Signature Update S481

Intrusion Prevention System (IPS) System Software:

• IPS-SSM_20-K9-sys-1.1-a-7.0-2-E4.img
  

        Release Date: 29/Mar/2010

        IPS-SSM_20 System Image File

Intrusion Prevention System (IPS) System Upgrades

• IPS-K9-7.0-2-E4.pkg
  

        Release Date: 29/Mar/2010

        IPS 7.0 Major Upgrade File (All Supported Platforms Except AIM-IPS and NME-IPS)

• IPS-engine-E4-req-7.0-2.pkg
  

        Release Date: 29/Mar/2010

        IPS E4 Engine Update

I am somewhat confused by the number of files and want to ask what the procedure/sequence I should follow to upgrade?