How to upgrade Kernal for ECC 5.0?

Hi,

I have installed a new SAP ECC 5.0 system. The release verion shows the current Release as 6.4 and Patch Level 43. Now I want to apply the latest patch on Kernal.

Can any one please provide me the steps for

1). How to proceed with the Kernal upgarde?

2). Which all files to be downloaded from Service Marketplace before proceeding

with the upgrade?

3). Any configurations/back up to be done before starting with upgradation?

4). Any document for the upgradation of Kernal.?

5). How to confirm whether the upgradation has been done sucessfully?

Please reply ASAP!

Thanks in advance.

Regards,

Manish